slowly varying drift forces - hydralab · slowly varying drift forces on a body of simple geometry...
TRANSCRIPT
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SLOWLY VARYING DRIFT FORCES
Acronym: HYIII – DHI – 8 - DRIFT EC contract no.: HYDRALAB – III (022441)
Status: draft
Date: November 2009
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Heading:
Infrastructure DHI Water & Environment
Project HYIII-DHI-8 DRIFT
Campaign Drift forces
Title Slowly varying drift forces
Participants Instituto Superior Técnico (IST) ;
Institut Francais de Recherche pour l’Exploitation de la Mer (IFREMER);
National Technical University of Athens (NTUA).
Lead Author Nuno Fonseca
Contributors João Pessoa
Date Campaign 11 May 2009 to 3 July 2009 (?)
Date final Completion 3 July 2009
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INDEX
1 SCIENTIFIC AIM AND BACKGROUND...................... .................................. 6
1.1 SCIENTIFIC AIM .............................................................................................. 6
1.2 BACKGROUND AND SCIENTIFIC CONTEXT ....................................................... 6
2 DESCRIPTION................................................................................................... 8
2.1 GENERAL DESCRIPTION OF THE TESTS............................................................ 8
2.2 CHARACTERISTICS OF THE BODY .................................................................... 9
2.3 DEFINITION OF THE COORDINATE SYSTEM USED............................................ 10
2.4 SHALLOW WATER TESTS.............................................................................. 10
2.4.1 Body Restrained from Moving.................................................................. 12
2.4.2 Freely Floating Model ............................................................................. 14
2.4.3 Still Water ............................................................................................... 19
2.5 DEEP WATER TESTS...................................................................................... 20
2.5.1 Body Restrained from Moving.................................................................. 21
2.5.2 Freely Floating Body............................................................................... 24
2.5.3 Still Water ............................................................................................... 25
2.5.4 No Body................................................................................................... 26
2.6 INERTIAL MOMENT TEST............................................................................... 30
2.6.1 Definition of the coordinate system used.................................................. 30
2.6.2 Description.............................................................................................. 31
2.6.3 Layout and list of instruments .................................................................. 31
2.7 CHARACTERISTICS OF INSTRUMENTS USED.................................................... 32
3 DATA ORGANIZATION................................................................................. 33
4 LIST OF TESTS................................................................................................ 35
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1 SCIENTIFIC AIM AND BACKGROUND
1.1 SCIENTIFIC AIM The objective of the experimental program is to obtain comprehensive data regarding the drift forces on a floating body of simple geometry. The aim is, firstly, to enhance the understanding of the physics of these second order forces and, secondly, to systematically assess the existing theoretical and numerical methods to calculate them.
The complete second order solution for the slow drift forces is now implemented in a few codes around the world, as for example in Wamit V6.1s (or Hydrostar). The complete solution of the slowly varying drift forces results from the interaction between pairs of harmonic components with different frequencies. Each pair of incident harmonic waves will result on a harmonic drift force changing slowly in time. Presently there is no experimental data available to assess the computational methods. Since the problem is very complex, the investigation will be carried out on a step by step basis, from the simpler problem to the most complex.
The general objective of the investigation is stated on the first paragraph. Specific objectives are:
(a) Obtain new experimental data on the drift forces in bi-harmonic waves with the same incidence but different frequencies.
(b) Obtain new experimental data on the drift forces in conditions represented by two systems of harmonic waves with the same frequency but different incidences.
(c) Assess the influence of the waterdepth on the mean and slowly varying drift forces.
The experimental data will be used to assess the existing codes based on the complete second order solution, establish the limits of application of the theory and verify the usual procedures to calculate the slow drift forces in irregular sea states and compare them with the complete solution.
1.2 BACKGROUND AND SCIENTIFIC CONTEXT Second order wave forces are important for different types of fixed and floating structures. Within a frequency domain approach, these forces can be decomposed into three components namely: a steady force, a difference frequency component and a sum frequency component. Sum and difference frequency effects are important for different problems. In the case of the difference frequency second order forces, they result on the slowly varying wave drift forces in irregular seas, which are important, for example, for floating moored structures. Usually the mooring system is compliant with the first order wave exciting forces since the natural period of the floater plus mooring is large compared to the wave period. However, the slowly varying drift forces have longer periods therefore they may excite the floater and mooring system at their natural frequency, resulting in large horizontal motions of the floater and tensions on the mooring lines.
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Although the subject of slowly varying drift forces has been well studied in the past from the theoretical and numerical point of view, for both single and multi body configurations, little experimental data is available. On the other hand, experimental studies focusing on steady drift forces were conducted by several researchers. Huijsmans et al. [1] have published the results of the steady drift forces on a semi submersible from an experimental program at the Maritime Research Institute in the Netherlands (MARIN).
Kashiwagi et. al [2] presented experimental results of the steady drift forces in a multi body configuration of a Wigley hull and a rectangular barge. The objective was to validate a new numerical method based on a far field approach for the calculation of the steady drift forces, however using a control surface around each body. Wichers [3] also conducted his experiments in MARIN, and studied the steady drift forces on a tanker while being towed, thus researching the steady drift forces with non zero forward speed.
Regarding the slowly varying drift forces, some experimental work has been presented as well, but focusing mainly on irregular sea states. As examples, Lee et al. [4] have conducted experiments on the slowly varying drift forces for a container ship model in an irregular sea state, while Tomaki at al. [5] studied the same forces on a very large floating structure for an irregular bidirectional sea state. Irregular wave results of drift forces are certainly useful, however they are not the best type of results to validate second order hydrodynamic theories and their numerical implementation.
The aim of the proposed experimental investigation is to obtain experimental data of the slowly varying drift forces on a body of simple geometry appropriate for the validation of theoretical and numerical methods. The tests will be carried out on a step by step basis, from the simpler problem of a restrained body in monochromatic waves to the most general problem of the free oscillating body in irregular waves.
One of the important groups of tests to be carried out consists of bi-chromatic wave conditions. In fact, the origin of the slowly varying drift forces lies on second order interactions between pairs of harmonic waves with different frequencies. The usual procedure for calculation of slow drift forces is to simplify the quadratic transfer function by representing the difference frequency components in terms of the zero difference results (Newmans’s approximation, Newman [6]). In this way the second order problem is much simplified as well as the computational effort. However this approximation has some limitations and in particular for the slow drift oscillations problem it may be important to consider correctly the difference frequency components (Fonseca et al. [7]). The experimental data in bi-chromatic waves will permit the assessment of the Newman´s approximation and also the validation of computer codes based on second order theory (Wamit V6.1s, Hydrostar from Bureau Veritas). Such experimental data is not available at the moment.
Tests in two systems of mono-chromatic waves with the same frequency but different incidence angles are also planned. The effects of water depth in the drift forces will also be investigated, since these effects are important (Fonseca et al. [7]).
References :
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[1]. R. H. M. Huijsmans and A. J. Hermans, 1988, “The effect of the steady perturbation potential on the motion of a ship sailing in random seas”. Proc. 5th Int. Conf. Num. Ship Hydrodyn., Hiroshima.
[2]. Kashiwagi, M., Endo, K., Yamaguchi, H., 2005, “Wave drift forces and moments on two ships arranged side by side in waves”, Ocean Engineering,, Vol.32, pp.529-555.
[3]. J. E.W.Wichers, “A Simulation Model for a Single Point Moored Tanker”. PhD thesis, TU Delft (1988) 243 pp.
[4]. S.K. Lee, H. Choi and S. Surendra, “Experimental studies on the slowly varying drift motion of a berthed container ship model”, Ocean Engineering, Vol. 33, Issues 17-18, December 2006, Pages 2454-2465.
[5]. Ikoma, Tomoki; Maeda, Hisaaki; Rheem, Chang-Kyu, “Slowly varying wave drifting force on a very large floating structure in short crested waves”, Oceans Conference Record (IEEE), v 1, 2000, p 533-539
[6]. Newman, J.N., 1974, “Second Order Slowly Varying Forces on Vessels in Irregular Waves”, Symp. on Dyn. of Mar. Veh. and Struct. in Waves, London.
[7]. Fonseca N., Pessoa J., Guedes Soares C., “Calculation of second order drift forces on a FLNG accounting for difference frequency components”, proceedings of OMAE, June 15-20, 2008, Estoril, Portugal
2 DESCRIPTION
2.1 GENERAL DESCRIPTION OF THE TESTS The aim of the experimental investigation is to obtain experimental data of the slowly varying drift forces on a body of simple geometry appropriate for the validation of theoretical and numerical methods. The tests were carried out on a step by step basis, from the simpler problem of a restrained body in monochromatic waves to the most general problem of the free oscillating body in irregular waves.
An important part of the study is to access the depth effects on the slowly varying drift forces, so the tests were carried out for 3 different water depths: 40 cm and 55 cm which are considered to be of the shallow water type, and 3 m representing deep waters. The first two were performed in the shallow water basin, while the last was performed in the offshore basin.
For each water depth, two different main types of experiments were performed. In the first type the body is held restrained from moving, subjected to incident waves and the loads are measured. The second type of experiments is performed with the body freely floating and held in its average position by a very soft mooring system. The body is subjected to incident waves and the resulting motions are recorded. A subtype of the freely floating body experiments that was also tested is the case where no incident waves are present, and an impulsive force is applied to the model. In this case the resulting decaying motions are recorded.
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For the deep water program an additional type of experiments with no body present but with waves and current was tested and the free surface elevation on certain geographical points was recorded. Another two additional subtype of experiments performed for this water depth was the case with the body restrained from moving and subjected to waves and current or to only current. In this case the forces acting on the body were measured. A schematic representation of these types of experiments can be seen on Figure 1.
Restrained body Freely floating body
Shallow Water Basin – Depths 40 cm and 55 cm
Incident waves Incident waves Still Water
Freely floating body
Incident waves Still Water
Deep Water Basin – Depth 3 m
Restrained body
Incident waves
Incident Waves and current
Incident current
No body
Incident waves
Incident Waves and current
Incident current
Figure 1 schematic plan of the experimental program
Adding to these tests, a centre of gravity and inertial moment test of the pendulum type was performed on the body out of the water.
2.2 CHARACTERISTICS OF THE BODY The tested body is a cylinder with rounded bottom. The curve that originates the wetted surface of the geometry by means of a 360º revolution can be seen in Figure 2. The dimensions and the aimed mass properties for the cylinder can be seen in Table 1.
Figure 2 curve whose 360 º revolution originates the wetted surface of the tested model
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Table 1 dimensions and aimed mass properties of the axisymmetrical body
Figure 3 on the left: model outside the water with a grid and the draught line drawn. On the right:
the model fixed to a rig and subjected to an incident long crested wave
2.3 DEFINITION OF THE COORDINATE SYSTEM USED The origin of the orthogonal coordinate system used in these experiments is located in the centre of the model at the calm free surface level. X is positive in the direction contrary to the propagation of the waves (and in some cases the current flow) and Z is positive upwards. All of the quantities measured are compliant with this coordinate system. All of the units in the acquired data are those of the International System (m, s, N, ms-1, ms-2)
2.4 SHALLOW WATER TESTS The shallow water tests were carried for two different water depths – 40 cm and 55 cm.
The basin itself includes an 18 meter wide segmented 3D piston type wave maker which is equipped with an active wave absorption system to avoid that waves reflected in the model are inputted again into to the basin. The controlling of the wave maker is done by using DHI Wave Synthesizer Software.
A dissipation beach is placed around 20 m away from the wave maker.
The model was located 8 meter away from the wave maker and at the centre of the wave makers’ width. A schematic representation of this set up can be seen in Figure 4.
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Figure 4 Shallow water basin particulars and model location
For this set of experiments, the model was attached to a triangular shaped rig, which was fixed to the bottom of the basin (an image of this rig with the model attached can be seen in Figure 5). The side of the rig to which the model was attached to is perpendicular to the propagation direction of the incident waves, and the remaining sides are placed downstream in order to minimize the hydrodynamic interference of the rigs’ fixing poles with the model (see Figure 5). The rigs’ fixing poles were prepared so that the set up would fit both water depths, fixing the model at exactly the correct draught. A 3D force transducer was placed between the rig and the model to measure the loads caused by wave-body interaction. A 3D accelerometer was placed on the model as well to ensure that no vibrations were being sent by the rig that might contaminate the results. Wave gauges were placed in front and on the side of the model to measure the free surface elevation. Another wave gauge was also attached to the model, in the symmetry axis which is in the direction of the wave propagation to measure the run up, and a grid of 1cm wide squares was attached on the model for visual measurement of the run up. A data acquisition system was installed in a platform downstream from where the model was placed. Some of the experiments were filmed with a high definition camera.
Figure 5 on the left: Triangular rig with the model attached. On the right: schematic representation
of the triangular rig
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The tests itself consists in running the wave maker during a certain amount of time, and measuring the loads in the model. In this case, monochromatic waves 1 to 10 and bichromatic waves 1 to 23 (see Table 2 to Table 5) were tested in both water depths. Test duration varied between 2 min for monochromatic waves and 5 min for bi-chromatic waves. Between each test the basins free surface is allowed to settle.
2.4.1 Body Restrained from Moving
2.4.1.1 Incident Waves
The waves selected for testing were chosen so that they would be in the relevant range of periods for the chosen geometry. They are restricted in wave height to avoid either the body to hit the bottom or the wave to break. Both monochromatic and bi-chromatic waves were tested, as well as some irregular seastates. For monochromatic waves a set of 10 waves was selected. In the case of bi-chromatic waves, three different set of waves were chosen so that the difference between the harmonics (dw) would be 0.5 (rad/s), 1.5 (rad/s) and 4 (rad/s), holding the first two sets 9 waves and the last set 5 waves. In addition to this, 3 2D Jonswap spectra irregular sea states were considered. On all the tests involving incident waves, and unless specified otherwise, the waves to be tested are the following (Table 2, Table 3, Table 4, Table 5 and Table 6):
Table 2 characteristics of the tested monochromatic waves
wave index T (s) A (cm)1 0.70 1.12 0.90 1.63 1.10 2.24 1.15 2.35 1.35 2.96 1.75 4.07 1.90 4.48 2.00 4.79 2.20 4.8
10 1.55 3.4
monochromatic waves
Table 3 characteristics of the tested bichromatic waves with dwwww=0.5 rad/s
wave index T1 (s) T2 (s) A1 (cm) A2 (cm)1 0.72 0.68 1.1 1.02 0.93 0.87 1.7 1.53 1.15 1.06 2.3 2.04 1.55 1.38 3.4 3.05 1.65 1.46 3.7 3.26 1.77 1.55 4.0 3.47 2.02 1.74 4.8 4.08 2.23 1.90 4.8 4.49 2.40 2.01 4.8 4.7
bichromatic waves - dw=0.5 (rad/s)
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Table 4 characteristics of the tested bichromatic waves with dwwww=1.5 rad/s
wave index T1 (s) T2 (s) A1 (cm) A2 (cm)10 0.76 0.65 1.2 0.911 1.01 0.81 1.9 1.412 1.27 0.97 2.6 1.813 1.55 1.13 3.4 2.314 1.83 1.27 4.2 2.715 2.00 1.36 4.7 2.916 2.31 1.49 4.8 3.317 2.46 1.55 4.8 3.418 2.72 1.65 4.8 3.7
bichromatic waves - dw=1.5 (rad/s)
Table 5 characteristics of the tested bichromatic waves with dwwww=4 rad/s
wave index T1 (s) T2 (s) A1 (cm) A2 (cm)19 1.11 0.65 2.2 0.920 1.35 0.73 2.9 1.121 1.55 0.78 3.4 1.322 1.70 0.82 3.9 1.423 1.90 0.86 4.4 1.5
bichromatic waves - dw=4 (rad/s)
Table 6 characteristics of the tested Jonswap irregular seastates
wave index T0(s) Hs (cm) Beta1 (deg) Beta2 (deg)1 1.55 6.80 - -2 1.55 6.80 -20.00 20.003 1.55 10.00 - -
Irregular waves - Jonswap Spectra
Irregular seastate 2 is in fact the superposition of two 2D irregular seastates with different directions, thus creating a 3D seastate.
2.4.1.2 List and Layout of Instruments
The following instruments were used:
• 8 Wave Gauges Type 202
• Amplifier Type 102E
• Accelerometer of the Setra type 141A
• Force transducer Type 205/3C
• Amplifier Type 106E
• 1 computer equipped with DHI Wave Synthesizer software for data acquisition
• Connecting cables
The 8 wave gauges were connected to the Amplifier Type 102E and both the Accelerometer and force transducers were connected to the strain amplifier type 106E. Both the amplifiers were then connected to the computer which acquired all the data at an 80 Hz sample rate. A schematic representation of this set up can be seen in Figure 1.
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Type 102 Wave gauge 1
Type 102E Amplifier
Type 102 Wave gauge 8
...
Type 102 Wave gauge 2
Type 106E Amplifier
Type 205/3C Force Transducer
Type 141A accelerometer
Computer with data logging software
Figure 6 Schematic representation of the instrumentation set up
Both the accelerometers and the force transducers were installed in the model. Six of the wave gauges were placed in front of the model, in the flow symmetry line, and one was placed 4 meters to the side of the centre of the model. The last wave gauge was fixed in front of the model to measure the run up. A schematic representation with the coordinates of the location of each wave gauge is shown on Figure 7.
Figure 7 Schematic representation of the experiment set up (not to scale)
2.4.2 Freely Floating Model
In the freely floating case, the model was held at its average position with a very soft mooring system. Four lines were attached to each quadrant of the model in such way
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that they would not touch the water, and with an inclination angle such that the mooring forces would pass approximately through the models centre of gravity (see Figure 8). This way the mooring systems effect on the dynamics of the model was minimized.
Figure 8 mooring lines layout
The lines were then connected to pulleys fixed on 4 poles at the necessary height to ensure the lines inclination angle. From there the lines were connected to another pulley, located further up the poles, and then to a chain resting in a bucket. The chains weight, 0.910 kg / m, ensures the design stiffness of the mooring system. About 1.5 m of each chain was left hanging to issue a certain pre tension to the mooring lines. A force transducer was placed between the lines and the chain to measure the tension. A schematic representation of this system can be seen in Figure 9.
The model was equipped with an optic motion detection system composed of two detecting cameras and 5 small and very light infrared light reflecting balls (called active markers) placed over the model (see
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Figure 10). A dedicated Pc stores the position of the markers for each time step at a sample rate of 80 Hz, and calculates the motions of the model in the 6 degree of freedom.
Figure 9 mooring system and pole layouts
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Figure 10 Motion detection system, composed by two detecting cameras and five active markers
placed in the model
A similar set up of 7 wave gauges was placed in the water, but with slightly different positions than in the case of the fixed model (see Figure 12). The wave run up gauge was removed from the model to avoid interference with the dynamics of the system. The data acquisition was installed in the same platform as that of the restrained model experiments. Some of the experiments were filmed with a high definition video camera.
2.4.2.1 Incident Waves
These sets of tests are very similar to the ones performed for the restrained model. Starting from its resting position, the model is subjected to incident waves generated by the wave maker during a period of time and the motions are recorded. The tests lasted between 3.5 min and 10 min, since in some of the tests it took a long time for the flow to reach a steady state.
For the 55 cm water depth, monochromatic waves 1 to 10 and bichromatic waves 1 to 23 were tested. In addition to that, surge decay tests with incident monochromatic waves 1 to 10 were performed to access the slow drift damping. The difference between this test and the last ones is that instead of having the model resting in its average location, an initial displacement in the surge motion mode is forced. After the generated monochromatic waves reach the model, it is released and the decaying motions are recorded. When the model reaches a steady state the test ends.
In the 40 cm water depth, the combination of the restricted water depth to the large motions of the model increased the risk that the model would touch the bottom of the basin. Due to this, it was necessary to reduce the amplitude in some of the tested waves. The following table presents the waves that endured changes in its amplitude. All of the remaining monochromatic and bichromatic tested waves were left unchanged.
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Table 7 characteristics of the alternative monochromatic wave for the 40 cm water depth
wave index T (s) A (cm)10 ' 1.55 0.9
monochromatic waves
Table 8 characteristics of the alternative bichromatic waves for the 40 cm water depth
wave index T1 (s) T2 (s) A1 (cm) A2 (cm)4 ' 1.55 1.38 0.8 0.75 ' 1.65 1.46 0.9 0.86 ' 1.77 1.55 1.0 0.8
13 ' 1.55 1.13 0.8 0.516 ' 2.31 1.49 1.2 0.817 ' 2.46 1.55 1.2 0.818 ' 2.72 1.65 2.4 1.921 ' 1.55 0.78 0.8 0.4
bichromatic waves
2.4.2.2 List and Layout of Instruments
The following instruments were used:
• 7 Wave Gauge Type 202
• Amplifier Type 102E
• 4 Force transducer type 211/50
• Amplifier Type 106E
• 2 infrared detecting cameras
• 5 active marker light sources
• Dedicated Pc for the MarineTrak motion sensing System
• 1 computer equipped with DHI Wave Synthesizer software for data acquisition
• Connecting cables
The 7 wave gauges were connected to the Amplifier Type 102E which was connected to the computer that acquired all the data at an 80 Hz sample rate.
The force transducers were connected to the type 106 E amplifier, which was the connected to the data acquiring computer.
The two cameras capture the position of the active makers and send it to the dedicated computer which calculates the motions on the 6 degree of freedom of the model. This information is then sent to the computer equipped with the data acquisition software. A schematic representation can be seen in Figure 11.
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Type 102 Wave gauge 1
Type 102E Amplifier
Type 102 Wave gauge 7
...
Type 102 Wave gauge 2
Dedicated PC
Infrared detecting camera 1
Infrared detecting camera 2
Computer with data logging software
Type 211/50 froce transducer 1
Type 106E Amplifier
Type 211/50 froce transducer 4
...
Type 211/50 froce transducer 2
Figure 11 Schematic representation of the instrumentation set up
The infrared detecting cameras were placed one on each side of the wave maker facing the model. The wave gauges were distributed in a very similar configuration as the previous set of tests, although the five gauges close to the model were moved in the wave maker direction to allow the model move freely. A schematic drawing with the coordinates of each of these equipments can be seen in Figure 12.
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Figure 12 Schematic representation of the experiment set up (not to scale)
2.4.3 Still Water
2.4.3.1 Description
In still water both free decay tests and metacentric height tests were done.
Surge, pitch and heave decay tests were performed for both water depths. These are done by forcing a displacement in each of the motion modes (but only one mode per test), then releasing the model and measuring the decaying motions.
Metacentric height tests are performed by placing a weight in the top edge of the model and measuring the heel angle. In this case a 1 kg weight was placed in x=0.31 m, y=0 m and z=0.2 m, so that only the pitch rotational mode would be affected, and the resulting angle was measured. This procedure was repeated both with and without the mooring lines attached to allow accessing the interference of the mooring system in this parameter.
2.4.3.2 List and Layout of Instruments
The instrumentation used in this set of experiments is:
• 2 infrared detecting cameras
• 5 active marker light sources
• Dedicated Pc for the MarineTrak motion sensing System
• 1 computer equipped with DHI Wave Synthesizer software for data acquisition
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• Connecting cables
• 1 weight with 1 Kg
The instrumentation layout is the same as shown before. See Figure 11.
2.5 DEEP WATER TESTS The deep water tests were carried out on the offshore basin, which has a water depth of 3 m.
This basin is 20 m long and 30 m wide, and includes a hydraulic flap wave maker controlled by DHI Wave Synthesizer software. A parabolic beech with holes and wave absorbs is included in the tank to drawback the energy given by the reflection, and it’s located in the opposite side to the wave maker at a distance of 11.6 m.
A set of portable noodles connected to hoses and a hydraulic pump that can be used to generate current in the tank is part of the equipment available in this basin. A large crane which can move in the y direction is used to fix the model, wave gauges and other types of equipment in the basin and creates a stable platform for people to work on. A smaller crane is also present and was used to fix the motion detection cameras.
The model was located at a distance of 7.6 m away from the wave maker, and at the centre of the basins width. A representation of this is shown on Figure 13.
Figure 13 Deep water or offshore basin particulars and model location
2.5.1 Body Restrained from Moving
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For this set of experiments, the model was attached to a triangular shaped rig, which was fixed to the large movable crane (an image of this rig with the model attached can be seen in Figure 14).
Figure 14 model fixed to the rig in the deep water basin
A 3D force transducer was placed between the rig and the model to measure the loads caused by wave-body interaction. A 3D accelerometer was placed on the model as well to ensure that no vibrations were being sent by the rig that might contaminate the results. Wave gauges were placed in front and on the side of the model to measure the free surface elevation. Another wave gauge was also attached to the model, in the symmetry axis which is in the direction of the wave propagation to measure the run up, and a grid of 1cm wide squares was attached on the model for visual measurement of the run up. A data acquisition system was installed on the side of the tank. Some of the experiments were filmed with a high definition camera.
2.5.1.1 Incident Waves
2.5.1.1.1 Description
The procedure for tests involving incident waves is the same as in shallow waters. See 2.4.1.1. For this situation, monochromatic waves 1 to 10, bichromatic waves 1 to 23 and irregular seastates 1 to 3 were tested during periods of time that varied between 2 min for monochromatic waves and 5 min for bi-chromatic waves. In the case of the irregular seastates, 15 min runs were considered.
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Table 9 characteristics of the monochromatic waves created to evaluate the wave amplitude effect on drift forces
wave index T (s) A (cm)1 1.30 1.02 1.30 2.03 1.30 3.04 1.30 4.05 1.30 6.56 1.30 7.57 1.30 98 1.30 119 1.30 13
10 0.90 0.511 0.90 1.212 0.90 1.913 0.90 2.614 0.90 3.315 0.90 4.016 0.90 5.017 0.90 6.018 0.90 7.0
Wave amp effect
In addition to these, a new set of waves was created to evaluate the influence of the wave amplitude on the drift forces. These are basically a set of monochromatic waves with the same period but different amplitudes. Two different periods with nine different amplitudes each were created. Its characteristics can be seen in the Table 9.
2.5.1.1.2 Layout and list of instruments
The instrumentation and layout of the set up is the same as the ones used in the analogous experimentations in the shallow water basin. See 2.4.1.2.
2.5.1.2 Current
2.5.1.2.1 Description
For this case the current portable noodles were placed about 1 m in front of the wave maker, which was not used. A close to uniform flow is achieved in the middle of the tank, where two circular flows meet (see Figure 15).
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Figure 15 Current flow representation in the deep water tank
Two current velocities were tested – 0.06 m/s and 0.12 m/s. The test consists in creating a current, heading in the negative x direction that reaches the model as close to a uniform flow as it was possible. No wave gauges were used, but a current meter was placed in the position where the model would be during a calibration run, 10 cm below the free surface. The forces acting on the model were measured with a force transducer placed between the model and the rig.
2.5.1.2.2 Layout and list of instruments
The following instruments were used:
• 1 MINILAB ultrasonic current meter system
• Force transducer Type 205/3C
• Amplifier Type 106E
• 1 computer equipped with DHI Wave Synthesizer software for data acquisition
• Connecting cables
The force transducer was connected to the strain amplifier type 106E. Both the amplifier and the current meter system were then connected to the computer which acquired all the data at an 80 Hz sample rate. A schematic representation can be seen in Figure 16.
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Figure 16 Schematic representation of the instrumentation set up
The force transducer was placed between the model and the rig, and the current meter was placed at x = 0.325 m, y = 0 m and z = -10 m during a calibration run.
2.5.1.3 Incident Waves and current
2.5.1.3.1 Description
This set of experiments is a combination of the previous two set of experiments. The procedure is simply to submit the model to the action of the current combined with incident waves. Both current speeds of 0.06 m/s and 0.12 m/s were tested, and each of the current speeds were combined with monochromatic waves 1, 3, 5, 7 and 9, and bichromatic waves 1, 3, 6, 8, 10, 13, 15 and 17. The forces acting on the model and the wave height in particular places were measured.
2.5.1.3.2 Layout and list of instruments
The same as in previous fixed body and incident waves experiments, but with the addition of the current meter system. See 2.4.1.2 and 2.5.1.2.2.
2.5.2 Freely Floating Body
In the freely floating case, the model was held at its average position with a very soft mooring system, designed in such way that it would have the same stiffness and pre-tension as in the shallow water case. The system layout is therefore very similar to the one presented before. The deepness of the tank made it impossible to have the poles installed inside the tank so they were installed in different geographical locations. The same inclination angle and the same spreading of the mooring lines were achieved by moving pulley n1 to a higher position (see Figure 9). Since the system is not symmetrical in respect to x axis, this position in the poles that are in the beach side is different to those that are in the wavemaker side.
Force transducer Type 205/3C Amplifier
Current meter system
Computer with data logging software
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Figure 17 Layout of the mooring system and camera positioning
The two cameras for the motion detection system were placed in a small crane in one of the sides of the tank, in a different layout than that of the shallow water case. This was due to the same reason that obligated to change the position of the mooring poles. The layout of both the mooring system and camera positioning can be seen in Figure 17.
2.5.2.1 Incident waves
2.5.2.1.1 Description
Both monochromatic waves 1 to 10 and bichromatic waves 1 to 23 were tested in this case. In addition to that, the monochromatic waves created for the wave amplitude effect experiments 1 to 18 were tested as well. The procedure is the same as in the fixed body case, although the body is left free to move and motions are recorded instead of forces. Also the surge decay test with monochromatic waves 1 to 10 was completed. The procedure for this was been explained in 2.4.2.1.
2.5.2.1.2 Layout and list of instruments
The instrumentation and layout is the same as in the shallow water case, except for the position of the motion detection cameras. See 2.4.2.2 and 2.5.2.
2.5.3 Still Water
2.5.3.1 Description
In this case both decay and metacentric height tests were performed. The procedure was the same as in the shallow water case for the decay tests. For the metacentric height tests, instead of using just one 1 kg weight, 3 different weights were used. A 0.1 kg, 0.2 kg and 0.5 kg weight were sequentially placed at x=0.31 m, y=0 m and z=0.2 m, and the resulting heel angle was measured. This test was done without the mooring system attached.
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2.5.3.2 Layout and list of instruments
The instrumentation used in this set of experiments is:
• 2 infrared detecting cameras
• 5 active marker light sources
• Dedicated Pc for the MarineTrak motion sensing System
• 1 computer equipped with DHI Wave Synthesizer software for data acquisition
• Connecting cables
• Weights of 0.1, 0.2 and 0.5 Kg, one of each
The layout is the same as shown before. See 2.4.2.2.
2.5.4 No Body
2.5.4.1 Description
This set of tests focused in the interaction between the waves and current, and targeted
to describe their interference. No body is present, so only wave heights were measured
for several combinations of waves, both regular and irregular, with and without an
uniform current coming from the opposite direction to that of the propagation of the
waves. The method to create this current is the same as used in 2.5.1.2, although the
current flumes were placed in the opposite side of the tank thus creating a symmetrical
flow to the one shown on Figure 15. The test itself consist in creating a certain wave
and current condition, and measure the wave heights with a configuration of seven wave
gauges and the current velocity with a current meter. During the tests real seastates were
scaled down to basin dimensions by a factor of l = 50. The conditions to be tested were
a set of regular waves (Table 10), the same set of regular waves plus 3 current
conditions (Table 11), a set of irregular Jonswap seastates (Table 12) and the
combination of this set with the 3 current conditions (Table 13), a set of double peak
spectra obtained by the superposition of two Jonswap spectra (Table 14) and the
combination of these with a current condition (Table 15), and finally a Jonswap spectra
with 2 different directional spreading of 2 and 10 degrees (Table 16) and the
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combination of these with the current conditions (Table 17). The duration of the tests
varied from 3 min for regular waves to 30 min in some of the irregular seastates. Table
10 toTable 17 present the main characteristics of the performed experiments.
Table 10 characteristics of the tested monochromatic waves and duration of the tests
T (s) A (cm) duration (min)0.57 2.5 30.85 2.5 31.13 2.5 30.85 5.0 31.13 5.0 31.41 5.0 30.99 7.5 31.27 7.5 31.56 7.5 3
monochromatic waves
Table 11 characteristics of the tested monochromatic waves and currents and duration of the tests
T (s) A (cm) U (ms -1) duration (min)0.57 2.5 0.08 30.85 2.5 0.04 30.85 2.5 0.08 30.85 2.5 0.12 31.13 2.5 0.08 30.85 5 0.08 31.13 5 0.04 31.13 5 0.08 31.13 5 0.12 31.41 5 0.08 30.99 7.5 0.08 31.27 7.5 0.04 31.27 7.5 0.08 31.27 7.5 0.12 31.56 7.5 0.08 3
monochromatic waves + current
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Table 12 characteristics of the tested irregular seastates and duration of the tests
Tp (s) Hs (cm) duration (min)0.99 5.0 201.41 5.0 201.98 5.0 200.99 7.0 301.41 7.0 300.99 9.0 201.41 9.0 301.98 9.0 201.41 16.0 201.98 16.0 201.70 20.0 201.98 20.0 201.70 24.0 201.98 24.0 20
Irregular Waves (Jonswap)
Table 13 characteristics of the tested irregular seastates and current and duration of the tests
Tp (s) Hs (cm) U (ms -1) duration (min)1.41 7 0.04 301.41 7 0.12 201.41 9 0.04 301.41 9 0.12 200.99 5 0.08 201.41 5 0.08 201.98 5 0.08 200.99 7 0.08 201.41 7 0.08 200.99 9 0.08 201.41 9 0.08 201.98 9 0.08 201.41 16 0.08 201.98 16 0.08 301.70 20 0.08 301.98 20 0.08 201.70 24 0.08 201.98 24 0.08 20
Irregular Waves (Jonswap) + current
Table 14 characteristics of the tested double peak irregular seastates and duration of the tests
Tp1 (s) Hs1 (cm) Tp2 (s) Hs2 (cm) duration (min)0.99 5.0 1.98 5.0 200.99 9.0 1.98 9.0 300.99 5.0 1.98 9.0 201.41 5.0 0.99 9.0 201.70 24.0 1.98 5.0 201.70 20.0 1.98 7.0 201.41 16.0 1.98 9.0 200.99 5.0 1.98 5.0 20
Double peak spectra (Jonswap)
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Table 15 characteristics of the tested double peak irregular seastates and current and duration of the tests
Tp1 (s) Hs1 (cm) Tp2 (s) Hs2 (cm) U (ms -1) duration (min)0.99 5.0 1.98 5.0 0.08 00.99 9.0 1.98 9.0 0.08 00.99 5.0 1.98 9.0 0.08 01.41 5.0 0.99 9.0 0.08 01.70 24.0 1.98 5.0 0.08 01.70 20.0 1.98 7.0 0.08 01.41 16.0 1.98 9.0 0.08 00.99 5.0 1.98 5.0 0.08 0
Double peak spectra (Jonswap) + current
Table 16 characteristics of the irregular seastates with directional spreading and duration of the
tests
Tp (s) Hs (cm) spreading (º) duration (min)1.41 9 2 301.41 9 10 30
Jonswap with directional spreading
Table 17 characteristics of the irregular seastates with directional spreading and currents and
duration of the tests
Tp (s) Hs (cm) spreading (º) U (ms -1) duration (min)1.41 9 2 0.04 201.41 9 2 0.08 301.41 9 2 0.12 201.41 9 10 0.04 201.41 9 10 0.08 301.41 9 10 0.12 20
Jonswap with directional spreading + current
2.5.4.2 Layout and list of instruments
The following instruments were used:
• 7 Wave Gauge Type 202
• Amplifier Type 102E
• 1 MINILAB ultrasonic current meter system
• Amplifier Type 106E
• 1 computer equipped with DHI Wave Synthesizer software for data acquisition
• Connecting cables
The 7 type 202 wave gauges are connected to the type 102E amplifier, and the current meter system was connected to the type 106E amplifier. Both the amplifiers were
31
connected to the computer equipped with data logging software. A schematic representation of this set up can be seen in Figure 18.
Type 102 Wave gauge 1
Type 102E Amplifier
Type 102 Wave gauge 7
...
Type 102 Wave gauge 2
Type 106E Amplifier
MINILAB ultrasonic current meter system Computer with
data logging software
Figure 18 Schematic representation of the instrumentation set up
The wave gauges were placed in a straight line aligned with both the wave direction and current flow. The current meter was positioned next to the middle wave gauge at a depth of 10 cm. A representation of this layout is shown in Figure 19.
Figure 19 Schematic representation of the experiment set up (not to scale)
2.6 INERTIAL MOMENT TEST 2.6.1 Definition of the coordinate system used
The orthogonal coordinate system used for this set of experiments is fixed with the body and placed at its symmetry axis, and at the mid height. Z is pointing upwards. The tension is measured in N.
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2.6.2 Description
An inertial moment test of the pendulum type was conducted in this experiment. The model is hanging from a structure by a line. There is a force transducer attached to the line to measure the tension. The model is given an initial displacement and is left to oscillate in a slowly decaying motion in the direction to which the inertial moment is to be measured. The variation in the measured tension is associated with the variation of the angular acceleration, so it is possible to measure the natural oscillation period, which is related with the inertial moment. Two different line lengths L were used - 1.525 m and 1.31 m – and both the inertial moment in the x and y directions were assessed. Figure 20 shows a schematic representation of this set up.
Figure 20 Schematic representation of the experiment set up
2.6.3 Layout and list of instruments
The following instruments were used:
• Force transducer Type 205/3C
• Amplifier Type 106E
• 1 computer equipped with DHI Wave Synthesizer software for data acquisition
• Connecting cables
• 1.525 m line
• 1.31 m line
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The force transducer was connected to the amplifier which was connected to the data logging computer. A schematic representation can be seen in Figure 21.
Computer with data logging software
Type 211/50 froce transducer 1
Type 106E Amplifier
Figure 21 Schematic representation of the instrumentation set up
2.7 CHARACTERISTICS OF INSTRUMENTS USED Name, type and descriptionName of instrument Gauge Type 202Quantity measured Free surface elevationBasis of measurement Conductivity between two parallel electrodes partly immersed in waterGeneral description Wave gaugeRange, accuracy and calibrationRange of measurement up to 96 cmAccuracy of measurement <1mmHow often it should be calibrated every dayCalibration procedure applying a known voltage to a known elevation of the F.S. by adjusting a gainInstalation, power and dataType of connector 4-pole LEMODimensionsLength (mm) 250 to 1000 (custumer specified) Name, type and descriptionName of instrument Wave Amplifier Module Type 102EGeneral description Signal amplifier / filterInstalation, power and dataPower supply/supplies required +- 15 VDC/+- 16mAType of connector 6-pole LEMO (gauge) / BNC on front (signal out)Details of data acquisition system Linearity better than 0.2% F.S.DimensionsLength (mm) 50.6Width (mm) 129Height (mm) 160Weight (kg) 0.56 Name, type and descriptionName of instrument Transducer type 211/50Quantity measured Tension (N)General description Force tranducerRange, accuracy and calibrationRange of measurement 50 NAccuracy of measurement < 0.05%Instalation, power and dataType of connector 6-pole LEMO Name, type and descriptionName of instrument Strain Amplifier Type 106EGeneral description High-Performance DC transducer amplifier for static / dynamic measurements Name, type and descriptionName of instrument DHI Wave SynthesizerGeneral description Data acquisition software using a I/O boardInstalation, power and dataType of connector analogue/digital I/O boardDetails of data acquisition system 12 bits input/output resolution, 2 output channels, ±5 V range
16, 32 or 64 input channels per board, built-in quartz clock
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Name, type and descriptionName of instrument Minilab current meterQuantity measured Flow velocityGeneral description 2D Ultrasonic current meterRange, accuracy and calibrationRange of measurement + - 10 m / sResolution 0.001 m / s
3 DATA ORGANIZATION The data collected in these experiments is recorded in an ASCII file format of the *.txt type. Each file includes: a header line that contains the information relative to the performed test, such as wave period and amplitude, or water depth; a second line in which the measured quantity for each column of the subsequent data is presented; a third line that should be disregarded; the actual data presented in columns – the number of columns is dependent of the type of test to which the data refers to. An example representing the first five lines of the monochromatic wave 1 in the 55 cm water depth test file is shown next:
First Line: Test no 97: H55 - monochromatic wave 1 - T1=0,7 A=1,1
Second Line: Time WG1 WG2 WG3 WG4 WG5 WG6 WG7 wave run up. Fx Fy Fz
Third Line : Unit 999 0 0 999 0 0 999 0 0 999 0
Fourth Line: 0 -0.000266667 -0.000124542 -0.000129915 0.000111355 0.000120147 -0.000165079 0.000186081 -8.20496E-005 0.107805 -0.167686 -0.344372
Fifth Line: 0.0125 -0.000266667 -0.000124542 -0.000129915 0.000697436 0.000510867 -0.000165079 -9.27936E-006 -8.20496E-005 0.107805 -0.119774 -0.284482
It should be noted that in the fixed model tests on the deep water basin, a small problem with calibration factor of the Surge forces has occurred. Because of that, the surge force in all of the monochromatic waves for that depth and up until the 7th wave (DeepDw05RestrainedT7.txt) in the bichromatic waves should be multiplied by a correction factor of -2. A similar problem occurred in bichromatic waves 12 to 23, for the freely floating body tests in the water depth of 55 cm with surge and heave motions. These quantities should be multiplied by a factor of 2.
The files containing this data are organized by test type and water depth and are stored in a main folder called tests – ascii files. The organization of this and all the subsequent folders is presented next:
1. tests – ascii files
1.1. calibration
1.1.1. H40 – 40 cm water depth tests
1.1.1.1.bichromatic waves
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1.1.1.2.monochromatic waves
1.1.2. H55 – 55 cm water depth tests
1.1.2.1.bichromatic waves
1.1.2.2.monochromatic waves
1.1.3. Hoo – 3 m water depth tests
1.1.3.1.bichromatic waves
1.1.3.2.current
1.1.3.3.irregular waves
1.1.3.4.monochromatic waves
1.1.3.5.wave amp effect
1.2. COG and inertial moment tests (out of the water - pendulum test)
1.3. Fixed body results
1.3.1. H40
1.3.1.1.bichromatic waves
1.3.1.2.monochromatic waves
1.3.2. H55
1.3.2.1.bichromatic waves
1.3.2.2.monochromatic waves
1.3.3. Hoo
1.3.3.1.bichromatic waves
1.3.3.2.irregular waves
1.3.3.3.monochromatic waves
1.3.3.4.wave amp effect
1.3.3.5.waves and current
1.4. freely floating body results
1.4.1. H40
1.4.1.1.bichromatic waves
1.4.1.2.COG tests
1.4.1.3.Decay tests
1.4.1.4.monochromatic waves
1.4.2. H55
1.4.2.1.bichromatic waves
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1.4.2.2.Decay tests
1.4.2.3.irregular seastates
1.4.2.4.monochromatic waves
1.4.2.5.Slow drift damping tests
1.4.3. Hoo
1.4.3.1.bichromatic waves
1.4.3.2.COG tests
1.4.3.3.decay tests
1.4.3.3.1. no mooring
1.4.3.3.2. with mooring
1.4.3.4.irregular waves
1.4.3.5.monochromatic waves
1.4.3.6.Slow drift damping tests
1.4.3.7.wave amp effect
1.5. No Body
1.5.1. current
1.5.1.1.monochromatic
1.5.1.2.irregular
1.5.1.2.1. jonswap
1.5.1.2.2. two peak jonswap
1.5.1.2.3. directional spreading
1.5.2. no current
1.5.2.1.monochromatic
1.5.2.2.irregular
1.5.2.2.1. jonswap
1.5.2.2.2. two peak jonswap
1.5.2.2.3. directional spreading
4 LIST OF TESTS What follows is a list of all the tests performed with the correspondent main particulars and the names of the ascii files where the data is stored.
Still water tests
Deep water File name
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Test nº
1 Determination of CG test DeepCOGTest1 - No mooring
2 Free decay test in heave 1 DeepFreeDecayHeave1 - no mooring
3 Free decay test in heave 2 DeepFreeDecayHeave2
4 Free decay test in heave 3 DeepFreeDecayHeave3
5 Free decay test in pitch 1 DeepFreeDecayPitch1 - no mooring
6 Free decay test in pitch 2 DeepFreeDecayPitch2 - no mooring
7 Free decay test in pitch 3 DeepFreeDecayPitch1 - with mooring
8 Free decay test in surge 1 DeepFreeDecaySurge1
9 Free decay test in surge 2 DeepFreeDecaySurge2
10 Free decay test in surge 3 DeepFreeDecaySurge3
H=0.40
Test nº
327 Determination of CG test H40COGTest1
328 Determination of CG test H40COGTest2
11 Free decay test in heave 1 H40FreeDecayHeave1
12 Free decay test in heave 2 H40FreeDecayHeave2
13 Free decay test in heave 3 H40FreeDecayHeave3
329 Free decay test in heave 4 H40FreeDecayHeave4
330 Free decay test in heave 5 H40FreeDecayHeave5
14 Free decay test in pitch 1 H40FreeDecayPitch1
15 Free decay test in pitch 2 H40FreeDecayPitch2
16 Free decay test in pitch 3 H40FreeDecayPitch3
331 Free decay test in pitch 4 H40FreeDecayPitch4
17 Free decay test in surge 1 H40FreeDecaySurge1
18 Free decay test in surge 2 H40FreeDecaySurge2
19 Free decay test in surge 3 H40FreeDecaySurge3
332 Free decay test in surge 4 H40FreeDecaySurge4
333 Free decay test in surge 5 H40FreeDecaySurge5
334 Free decay test in roll 1 H40FreeDecayRoll1
335 Free decay test in roll 2 H40FreeDecayRoll2
H=0.55
Test nº
20 Free decay test in heave 1 H55FreeDecayHeave1
21 Free decay test in heave 2 H55FreeDecayHeave2
22 Free decay test in heave 3 H55FreeDecayHeave3
336 Free decay test in heave 4 H55FreeDecayHeave4
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23 Free decay test in pitch 1 H55FreeDecayPitch1
24 Free decay test in pitch 2 H55FreeDecayPitch2
25 Free decay test in pitch 3 H55FreeDecayPitch3
26 Free decay test in surge 1 H55FreeDecaySurge1
27 Free decay test in surge 2 H55FreeDecaySurge2
28 Free decay test in surge 3 H55FreeDecaySurge3
336 Free decay test in surge 4 H55FreeDecaySurge4
Out of the water - pendulum test
Test nº
319 Inertia about xx axis - lenght 1 COG and Ixx test 1 L1
320 Inertia about xx axis - lenght 2 COG and Ixx test 1 L2
321 Inertia about xx axis - lenght 2 COG and Ixx test 2 L2
322 Inertia about yy axis - lenght 1 COG and Ixx test 1 L1
323 Inertia about yy axis - lenght 1 COG and Ixx test 2 L1
324 Inertia about yy axis - lenght 1 COG and Ixx test 1 L2
325 Inertia about yy axis - lenght 2 COG and Ixx test 2 L2
326 Inertia about yy axis - lenght 2 COG and Ixx test 3 L2
RESTRAINED BODY - depth = 0.40m
Test nº Condition T1 (s) T2 (s) A1 (cm) A2 (cm) Tm(s) dw(rad/s) File name calibration File
dw(rad/s)= 0.00
62 Restrained 0.70 - 1.1 - 0.70 H40Dw00RestrainedT1 calH40Dw00T1
63 Restrained 0.90 - 1.6 - 0.90 H40Dw00RestrainedT2 calH40Dw00T2
64 Restrained 1.10 - 2.2 - 1.10 H40Dw00RestrainedT3 calH40Dw00T3
65 Restrained 1.15 - 2.3 - 1.30 H40Dw00RestrainedT4 calH40Dw00T4
66 Restrained 1.35 - 2.9 - 1.50 H40Dw00RestrainedT5 calH40Dw00T5
67 Restrained 1.75 - 4.0 - 1.70 H40Dw00RestrainedT6 calH40Dw00T6
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68 Restrained 1.90 - 4.4 - 1.90 H40Dw00RestrainedT7 calH40Dw00T7
69 Restrained 2.00 - 4.7 - 2.10 H40Dw00RestrainedT8 calH40Dw00T8
70 Restrained 2.20 - 4.8 - 2.30 H40Dw00RestrainedT9 calH40Dw00T9
71 Restrained 1.55 - 3.4 - 2.50 H40Dw00RestrainedT10 calH40Dw00T10
dw(rad/s)= 0.50
72 Restrained 0.72 0.68 1.1 1.0 0.70 0.5 H40Dw05RestrainedT1 calH40Dw05T1
73 Restrained 0.93 0.87 1.7 1.5 0.90 0.5 H40Dw05RestrainedT2 calH40Dw05T2
74 Restrained 1.15 1.06 2.3 2.0 1.10 0.5 H40Dw05RestrainedT3 calH40Dw05T3
75 Restrained 1.55 1.38 3.4 3.0 1.46 0.5 H40Dw05RestrainedT4 calH40Dw05T4
76 Restrained 1.65 1.46 3.7 3.2 1.55 0.5 H40Dw05RestrainedT5 calH40Dw05T5
77 Restrained 1.77 1.55 4.0 3.4 1.66 0.5 H40Dw05RestrainedT6 calH40Dw05T6
78 Restrained 2.02 1.74 4.8 4.0 1.88 0.5 H40Dw05RestrainedT7 calH40Dw05T7
79 Restrained 2.23 1.90 4.8 4.4 2.06 0.5 H40Dw05RestrainedT8 calH40Dw05T8
80 Restrained 2.40 2.01 4.8 4.7 2.21 0.5 H40Dw05RestrainedT9 calH40Dw05T9
dw(rad/s)= 1.50
81 Restrained 0.76 0.65 1.2 0.9 0.70 1.5 H40Dw15RestrainedT1 calH40Dw15T1
82 Restrained 1.01 0.81 1.9 1.4 0.91 1.5 H40Dw15RestrainedT2 calH40Dw15T2
83 Restrained 1.27 0.97 2.6 1.8 1.12 1.5 H40Dw15RestrainedT3 calH40Dw15T3
84 Restrained 1.55 1.13 3.4 2.3 1.34 1.5 H40Dw15RestrainedT4 calH40Dw15T4
85 Restrained 1.83 1.27 4.2 2.7 1.55 1.5 H40Dw15RestrainedT5 calH40Dw15T5
86 Restrained 2.00 1.36 4.7 2.9 1.68 1.5 H40Dw15RestrainedT6 calH40Dw15T6
87 Restrained 2.31 1.49 4.8 3.3 1.90 1.5 H40Dw15RestrainedT7 calH40Dw15T7
88 Restrained 2.46 1.55 4.8 3.4 2.01 1.5 H40Dw15RestrainedT8 calH40Dw15T8
40
89 Restrained 2.72 1.65 4.8 3.7 2.19 1.5 H40Dw15RestrainedT9 calH40Dw15T9
dw(rad/s)= 4.00
90 Restrained 1.11 0.65 2.2 0.9 0.88 4 H40Dw15RestrainedT1 calH40Dw15T1
91 Restrained 1.35 0.73 2.9 1.1 1.04 4 H40Dw15RestrainedT2 calH40Dw15T2
92 Restrained 1.55 0.78 3.4 1.3 1.17 4 H40Dw15RestrainedT3 calH40Dw15T3
93 Restrained 1.70 0.82 3.9 1.4 1.26 4 H40Dw15RestrainedT4 calH40Dw15T4
94 Restrained 1.90 0.86 4.4 1.5 1.38 4 H40Dw15RestrainedT5 calH40Dw15T5
FREE BODY - depth = 0.40m
Test nº Condition T1 (s) T2 (s) A1 (cm) A2 (cm) Tm (s) File name
dw(rad/s)= 0.00
95 Free 0.70 - 1.1 - 0.70 H40Dw00FreeT1
96 Free 0.90 - 1.6 - 0.90 H40Dw00FreeT2
97 Free 1.10 - 2.2 - 1.10 H40Dw00FreeT3
98 Free 1.15 - 2.3 - 1.30 H40Dw00FreeT4
99 Free 1.35 - 2.9 - 1.50 H40Dw00FreeT5
100 Free 1.75 - 4.0 - 1.70 H40Dw00FreeT6
101 Free 1.90 - 4.4 - 1.90 H40Dw00FreeT7
102 Free 2.00 - 4.7 - 2.10 H40Dw00FreeT8
103 Free 2.20 - 4.8 - 2.30 H40Dw00FreeT9
104 Free 1.55 - 0.9 - 2.50 H40Dw00FreeT10
dw(rad/s)= 0.50
105 Free 0.72 0.68 1.1 1.0 0.70 H40Dw05FreeT1
106 Free 0.93 0.87 1.7 1.5 0.90 H40Dw05FreeT2
107 Free 1.15 1.06 2.3 2.0 1.10 H40Dw05FreeT3
108 Free 1.55 1.38 0.8 0.7 1.46 H40Dw05FreeT4
109 Free 1.65 1.46 0.9 0.8 1.55 H40Dw05FreeT5
110 Free 1.77 1.55 1.0 0.8 1.66 H40Dw05FreeT6
111 Free 2.02 1.74 4.8 4.0 1.88 H40Dw05FreeT7
112 Free 2.23 1.90 4.8 4.4 2.06 H40Dw05FreeT8
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113 Free 2.40 2.01 4.8 4.7 2.21 H40Dw05FreeT9
dw(rad/s)= 1.50
114 Free 0.76 0.65 1.2 0.9 0.70 H40Dw15FreeT1
115 Free 1.01 0.81 1.9 1.4 0.91 H40Dw15FreeT2
116 Free 1.27 0.97 2.6 1.8 1.12 H40Dw15FreeT3
117 Free 1.55 1.13 0.8 0.5 1.34 H40Dw15FreeT4
118 Free 1.83 1.27 4.2 2.7 1.55 H40Dw15FreeT5
119 Free 2.00 1.36 4.7 2.9 1.68 H40Dw15FreeT6
120 Free 2.31 1.49 1.2 0.8 1.90 H40Dw15FreeT7
121 Free 2.46 1.55 1.2 0.8 2.01 H40Dw15FreeT8
122 Free 2.72 1.65 2.4 1.9 2.19 H40Dw15FreeT9
dw(rad/s)= 4.00
123 Free 1.11 0.65 2.2 0.9 0.88 H40Dw40FreeT1
124 Free 1.35 0.73 2.9 1.1 1.04 H40Dw40FreeT2
125 Free 1.55 0.78 0.8 0.4 1.17 H40Dw40FreeT3
126 Free 1.70 0.82 3.9 1.4 1.26 H40Dw40FreeT4
127 Free 1.90 0.86 4.4 1.5 1.38 H40Dw40FreeT5
RESTRAINED BODY - depth = 0.55m
Test nº Condition T1 (s) T2 (s) A1 (cm) A2 (cm) Tm (s) wave index File name Calibration
dw(rad/s)= 0.00
29 Restrained 0.70 - 1.1 - 0.70 1 H55Dw00RestrainedT1 CalH55Dw00T1
30 Restrained 0.90 - 1.6 - 0.90 2 H55Dw00RestrainedT2 CalH55Dw00T2
31 Restrained 1.10 - 2.2 - 1.10 3 H55Dw00RestrainedT3 CalH55Dw00T3
32 Restrained 1.15 - 2.3 - 1.30 4 H55Dw00RestrainedT4 CalH55Dw00T4
33 Restrained 1.35 - 2.9 - 1.50 5 H55Dw00RestrainedT5 CalH55Dw00T5
34 Restrained 1.75 - 4.0 - 1.70 6 H55Dw00RestrainedT6 CalH55Dw00T6
35 Restrained 1.90 - 4.4 - 1.90 7 H55Dw00RestrainedT7 CalH55Dw00T7
36 Restrained 2.00 - 4.7 - 2.10 8 H55Dw00RestrainedT8 CalH55Dw00T8
37 Restrained 2.20 - 4.8 - 2.30 9 H55Dw00RestrainedT9 CalH55Dw00T9
42
38 Restrained 1.55 - 3.4 - 2.50 10 H55Dw00RestrainedT10 CalH55Dw00T10
dw(rad/s)= 0.50
39 Restrained 0.72 0.68 1.1 1.0 0.70 0.5 1 H55Dw05RestrainedT1 CalH55Dw05T1
40 Restrained 0.93 0.87 1.7 1.5 0.90 0.5 2 H55Dw05RestrainedT2 CalH55Dw05T2
41 Restrained 1.15 1.06 2.3 2.0 1.10 0.5 3 H55Dw05RestrainedT3 CalH55Dw05T3
42 Restrained 1.55 1.38 3.4 3.0 1.46 0.5 4 H55Dw05RestrainedT4 CalH55Dw05T4
43 Restrained 1.65 1.46 3.7 3.2 1.55 0.5 5 H55Dw05RestrainedT5 CalH55Dw05T5
44 Restrained 1.77 1.55 4.0 3.4 1.66 0.5 6 H55Dw05RestrainedT6 CalH55Dw05T6
45 Restrained 2.02 1.74 4.8 4.0 1.88 0.5 7 H55Dw05RestrainedT7 CalH55Dw05T7
46 Restrained 2.23 1.90 4.8 4.4 2.06 0.5 8 H55Dw05RestrainedT8 CalH55Dw05T8
47 Restrained 2.40 2.01 4.8 4.7 2.21 0.5 9 H55Dw05RestrainedT9 CalH55Dw05T9
dw(rad/s)= 1.50
48 Restrained 0.76 0.65 1.2 0.9 0.70 1.5 10 H55Dw15RestrainedT1 CalH55Dw15T1
49 Restrained 1.01 0.81 1.9 1.4 0.91 1.5 11 H55Dw15RestrainedT2 CalH55Dw15T2
50 Restrained 1.27 0.97 2.6 1.8 1.12 1.5 12 H55Dw15RestrainedT3 CalH55Dw15T3
51 Restrained 1.55 1.13 3.4 2.3 1.34 1.5 13 H55Dw15RestrainedT4 CalH55Dw15T4
52 Restrained 1.83 1.27 4.2 2.7 1.55 1.5 14 H55Dw15RestrainedT5 CalH55Dw15T5
53 Restrained 2.00 1.36 4.7 2.9 1.68 1.5 15 H55Dw15RestrainedT6 CalH55Dw15T6
54 Restrained 2.31 1.49 4.8 3.3 1.90 1.5 16 H55Dw15RestrainedT7 CalH55Dw15T7
55 Restrained 2.46 1.55 4.8 3.4 2.01 1.5 17 H55Dw15RestrainedT8 CalH55Dw15T8
56 Restrained 2.72 1.65 4.8 3.7 2.19 1.5 18 H55Dw15RestrainedT9 CalH55Dw15T9
dw(rad/s)= 4.00
43
57 Restrained 1.11 0.65 2.2 0.9 0.88 4 19 H55Dw40RestrainedT1 CalH55Dw40T1
58 Restrained 1.35 0.73 2.9 1.1 1.04 4 20 H55Dw40RestrainedT2 CalH55Dw40T2
59 Restrained 1.55 0.78 3.4 1.3 1.17 4 21 H55Dw40RestrainedT3 CalH55Dw40T3
60 Restrained 1.70 0.82 3.9 1.4 1.26 4 22 H55Dw40RestrainedT4 CalH55Dw40T4
61 Restrained 1.90 0.86 4.4 1.5 1.38 4 23 H55Dw40RestrainedT5 CalH55Dw40T5
FREE BODY - depth = 0.55m
Test nº Condition T1 (s) T2 (s) A1 (cm) A2 (cm) Tm(s) dw(rad/s) File name
dw(rad/s)= 0.00
128 Free 0.70 - 1.1 - 0.70 H55Dw00FreeT1
129 Free 0.90 - 1.6 - 0.90 H55Dw00FreeT2
130 Free 1.10 - 2.2 - 1.10 H55Dw00FreeT3
131 Free 1.15 - 2.3 - 1.30 H55Dw00FreeT4
132 Free 1.35 - 2.9 - 1.50 H55Dw00FreeT5
133 Free 1.75 - 4.0 - 1.70 H55Dw00FreeT6
134 Free 1.90 - 4.4 - 1.90 H55Dw00FreeT7
135 Free 2.00 - 4.7 - 2.10 H55Dw00FreeT8
136 Free 2.20 - 4.8 - 2.30 H55Dw00FreeT9
137 Free 1.55 - 0.9 - 2.50 H55Dw00FreeT10
dw(rad/s)= 0.50
138 Free 0.72 0.68 1.1 1.0 0.70 0.5 H55Dw05FreeT1
139 Free 0.93 0.87 1.7 1.5 0.90 0.5 H55Dw05FreeT2
140 Free 1.15 1.06 2.3 2.0 1.10 0.5 H55Dw05FreeT3
141 Free 1.55 1.38 0.8 0.7 1.46 0.5 H55Dw05FreeT4
142 Free 1.65 1.46 0.9 0.8 1.55 0.5 H55Dw05FreeT5
143 Free 1.77 1.55 1.0 0.8 1.66 0.5 H55Dw05FreeT6
144 Free 2.02 1.74 4.8 4.0 1.88 0.5 H55Dw05FreeT7
145 Free 2.23 1.90 4.8 4.4 2.06 0.5 H55Dw05FreeT8
146 Free 2.40 2.01 4.8 4.7 2.21 0.5 H55Dw05FreeT9
dw(rad/s)= 1.50
147 Free 0.76 0.65 1.2 0.9 0.70 1.5 H55Dw15FreeT1
44
148 Free 1.01 0.81 1.9 1.4 0.91 1.5 H55Dw15FreeT2
149 Free 1.27 0.97 2.6 1.8 1.12 1.5 H55Dw15FreeT3
150 Free 1.55 1.13 0.8 0.5 1.34 1.5 H55Dw15FreeT4
151 Free 1.83 1.27 4.2 2.7 1.55 1.5 H55Dw15FreeT5
152 Free 2.00 1.36 4.7 2.9 1.68 1.5 H55Dw15FreeT6
153 Free 2.31 1.49 1.2 0.8 1.90 1.5 H55Dw15FreeT7
154 Free 2.46 1.55 1.2 0.8 2.01 1.5 H55Dw15FreeT8
155 Free 2.72 1.65 2.4 1.9 2.19 1.5 H55Dw15FreeT9
dw(rad/s)= 4.00
156 Free 1.11 0.65 2.2 0.9 0.88 4 H55Dw40FreeT1
157 Free 1.35 0.73 2.9 1.1 1.04 4 H55Dw40FreeT2
158 Free 1.55 0.78 0.8 0.4 1.17 4 H55Dw40FreeT3
159 Free 1.70 0.82 3.9 1.4 1.26 4 H55Dw40FreeT4
160 Free 1.90 0.86 4.4 1.5 1.38 4 H55Dw40FreeT5
RESTRAINED BODY - deep water
Test nº Condition T1 (s) T2 (s) A1 (cm) A2 (cm) Tm(s) dw(rad/s) Filename Calibration
dw(rad/s)= 0.00
157 Restrained 0.70 - 1.1 - 0.7 DeepDw00RestrainedT1 CalDeepDw00T1
158 Restrained 0.90 - 1.6 - 0.9 DeepDw00RestrainedT2 CalDeepDw00T2
159 Restrained 1.10 - 2.2 - 1.1 DeepDw00RestrainedT3 CalDeepDw00T3
160 Restrained 1.15 - 2.3 - 1.3 DeepDw00RestrainedT4 CalDeepDw00T4
161 Restrained 1.35 - 2.9 - 1.5 DeepDw00RestrainedT5 CalDeepDw00T5
162 Restrained 1.75 - 4.0 - 1.7 DeepDw00RestrainedT6 CalDeepDw00T6
163 Restrained 1.90 - 4.4 - 1.9 DeepDw00RestrainedT7 CalDeepDw00T7
164 Restrained 2.00 - 4.7 - 2.1 DeepDw00RestrainedT8 CalDeepDw00T8
165 Restrained 2.20 - 4.8 - 2.3 DeepDw00RestrainedT9 CalDeepDw00T9
166 Restrained 1.55 - 3.4 - 2.5 DeepDw00RestrainedT10 CalDeepDw00T10
45
dw(rad/s)= 0.50
167 Restrained 0.72 0.68 1.1 1.0 0.70 0.5 DeepDw05RestrainedT1 CalDeepDw05T1
168 Restrained 0.93 0.87 1.7 1.5 0.90 0.5 DeepDw05RestrainedT2 CalDeepDw05T2
169 Restrained 1.15 1.06 2.3 2.0 1.10 0.5 DeepDw05RestrainedT3 CalDeepDw05T3
170 Restrained 1.55 1.38 3.4 3.0 1.46 0.5 DeepDw05RestrainedT4 CalDeepDw05T4
171 Restrained 1.65 1.46 3.7 3.2 1.55 0.5 DeepDw05RestrainedT5 CalDeepDw05T5
172 Restrained 1.77 1.55 4.0 3.4 1.66 0.5 DeepDw05RestrainedT6 CalDeepDw05T6
173 Restrained 2.02 1.74 4.8 4.0 1.88 0.5 DeepDw05RestrainedT7 CalDeepDw05T7
174 Restrained 2.23 1.90 4.8 4.4 2.06 0.5 DeepDw05RestrainedT8 CalDeepDw05T8
175 Restrained 2.40 2.01 4.8 4.7 2.21 0.5 DeepDw05RestrainedT9 CalDeepDw05T9
dw(rad/s)= 1.50
176 Restrained 0.76 0.65 1.2 0.9 0.70 1.5 DeepDw15RestrainedT1 CalDeepDw15T1
177 Restrained 1.01 0.81 1.9 1.4 0.91 1.5 DeepDw15RestrainedT2 CalDeepDw15T2
178 Restrained 1.27 0.97 2.6 1.8 1.12 1.5 DeepDw15RestrainedT3 CalDeepDw15T3
179 Restrained 1.55 1.13 3.4 2.3 1.34 1.5 DeepDw15RestrainedT4 CalDeepDw15T4
180 Restrained 1.83 1.27 4.2 2.7 1.55 1.5 DeepDw15RestrainedT5 CalDeepDw15T5
181 Restrained 2.00 1.36 4.7 2.9 1.68 1.5 DeepDw15RestrainedT6 CalDeepDw15T6
182 Restrained 2.31 1.49 4.8 3.3 1.90 1.5 DeepDw15RestrainedT7 CalDeepDw15T7
183 Restrained 2.46 1.55 4.8 3.4 2.01 1.5 DeepDw15RestrainedT8 CalDeepDw15T8
184 Restrained 2.72 1.65 4.8 3.7 2.19 1.5 DeepDw15RestrainedT9 CalDeepDw15T9
dw(rad/s)= 4.00 Tm(s) dw(rad/s)
185 Restrained 1.11 0.65 2.2 0.9 0.88 4 DeepDw40RestrainedT1 CalDeepDw40T1
186 Restrained 1.35 0.73 2.9 1.1 1.04 4 DeepDw40RestrainedT2 CalDeepDw40T2
46
187 Restrained 1.55 0.78 3.4 1.3 1.17 4 DeepDw40RestrainedT3 CalDeepDw40T3
188 Restrained 1.70 0.82 3.9 1.4 1.26 4 DeepDw40RestrainedT4 CalDeepDw40T4
189 Restrained 1.90 0.86 4.4 1.5 1.38 4 DeepDw40RestrainedT5 CalDeepDw40T5
FREE BODY - deep water
Test nº Condition T1 (s) T2 (s) A1 (cm) A2 (cm) Tm(s) dw(rad/s) File name
dw(rad/s)= 0.00
190 Free 0.70 - 1.1 - 0.7 DeepDw00FreeT1
191 Free 0.90 - 1.6 - 0.9 DeepDw00FreeT2
192 Free 1.10 - 2.2 - 1.1 DeepDw00FreeT3
193 Free 1.15 - 2.3 - 1.3 DeepDw00FreeT4
194 Free 1.35 - 2.9 - 1.5 DeepDw00FreeT5
195 Free 1.75 - 4.0 - 1.7 DeepDw00FreeT6
196 Free 1.90 - 4.4 - 1.9 DeepDw00FreeT7
197 Free 2.00 - 4.7 - 2.1 DeepDw00FreeT8
198 Free 2.20 - 4.8 - 2.3 DeepDw00FreeT9
199 Free 1.55 - 3.4 - 2.5 DeepDw00FreeT10
dw(rad/s)= 0.50
200 Free 0.72 0.68 1.1 1.0 0.70 0.5 DeepDw05FreeT1
201 Free 0.93 0.87 1.7 1.5 0.90 0.5 DeepDw05FreeT2
202 Free 1.15 1.06 2.3 2.0 1.10 0.5 DeepDw05FreeT3
203 Free 1.55 1.38 3.4 3.0 1.46 0.5 DeepDw05FreeT4
204 Free 1.65 1.46 3.7 3.2 1.55 0.5 DeepDw05FreeT5
205 Free 1.77 1.55 4.0 3.4 1.66 0.5 DeepDw05FreeT6
206 Free 2.02 1.74 4.8 4.0 1.88 0.5 DeepDw05FreeT7
207 Free 2.23 1.90 4.8 4.4 2.06 0.5 DeepDw05FreeT8
208 Free 2.40 2.01 4.8 4.7 2.21 0.5 DeepDw05FreeT9
dw(rad/s)= 1.50
209 Free 0.76 0.65 1.2 0.9 0.70 1.5 DeepDw15FreeT1
210 Free 1.01 0.81 1.9 1.4 0.91 1.5 DeepDw15FreeT2
211 Free 1.27 0.97 2.6 1.8 1.12 1.5 DeepDw15FreeT3
212 Free 1.55 1.13 3.4 2.3 1.34 1.5 DeepDw15FreeT4
213 Free 1.83 1.27 4.2 2.7 1.55 1.5 DeepDw15FreeT5
214 Free 2.00 1.36 4.7 2.9 1.68 1.5 DeepDw15FreeT6
215 Free 2.31 1.49 4.8 3.3 1.90 1.5 DeepDw15FreeT7
216 Free 2.46 1.55 4.8 3.4 2.01 1.5 DeepDw15FreeT8
47
217 Free 2.72 1.65 4.8 3.7 2.19 1.5 DeepDw15FreeT9
dw(rad/s)= 4.00
218 Free 1.11 0.65 2.2 0.9 0.88 4 DeepDw40FreeT1
219 Free 1.35 0.73 2.9 1.1 1.04 4 DeepDw40FreeT2
220 Free 1.55 0.78 3.4 1.3 1.17 4 DeepDw40FreeT3
221 Free 1.70 0.82 3.9 1.4 1.26 4 DeepDw40FreeT4
222 Free 1.90 0.86 4.4 1.5 1.38 4 DeepDw40FreeT5
RESTRAINED BODY - deep water – Wave amp Effect
Test nº Condition T1 (s) A1 (cm) T2 (s) File name Calibration
dw(rad/s)= 0.00
263 Restrained 1.30 1.0 - DeepT1RestrainedAmp1 CalDeepT1A1
264 Restrained 1.30 2.0 - DeepT1RestrainedAmp2 CalDeepT1A2
265 Restrained 1.30 3.0 - DeepT1RestrainedAmp3 CalDeepT1A3
266 Restrained 1.30 4.0 - DeepT1RestrainedAmp4 CalDeepT1A4
267 Restrained 1.30 6.5 - DeepT1RestrainedAmp5 CalDeepT1A5
268 Restrained 1.30 7.5 - DeepT1RestrainedAmp6 CalDeepT1A6
333 Restrained 1.30 9 - DeepT1RestrainedAmp7
334 Restrained 1.30 11 - DeepT1RestrainedAmp8
335 Restrained 1.30 13 - DeepT1RestrainedAmp9
269 Restrained 0.90 0.5 - DeepT2RestrainedAmp1 CalDeepT2A1
270 Restrained 0.90 1.2 - DeepT2RestrainedAmp2 CalDeepT2A2
271 Restrained 0.90 1.9 - DeepT2RestrainedAmp3 CalDeepT2A3
272 Restrained 0.90 2.6 - DeepT2RestrainedAmp4 CalDeepT2A4
273 Restrained 0.90 3.3 - DeepT2RestrainedAmp5 CalDeepT2A5
274 Restrained 0.90 4.0 - DeepT2RestrainedAmp6 CalDeepT2A6
336 Restrained 0.90 5.0 - DeepT2RestrainedAmp7
48
337 Restrained 0.90 6.0 - DeepT2RestrainedAmp8
338 Restrained 0.90 7.0 - DeepT2RestrainedAmp9
dw(rad/s)= 0.00
275 Free 1.30 1.0 - DeepT1FreeAmp1
276 Free 1.30 2.0 - DeepT1FreeAmp2
277 Free 1.30 3.0 - DeepT1FreeAmp3
278 Free 1.30 4.0 - DeepT1FreeAmp4
279 Free 1.30 6.5 - DeepT1FreeAmp5
280 Free 1.30 7.5 - DeepT1FreeAmp6
281 Free 0.90 0.5 - DeepT2FreeAmp1
282 Free 0.90 1.2 - DeepT2FreeAmp2
283 Free 0.90 1.9 - DeepT2FreeAmp3
284 Free 0.90 2.6 - DeepT2FreeAmp4
285 Free 0.90 3.3 - DeepT2FreeAmp5
286 Free 0.90 4.0 - DeepT2FreeAmp6
339 Free 0.90 5.0 - DeepT2FreeAmp7
340 Free 0.90 6.0 - DeepT2FreeAmp8
341 Free 0.90 7.0 - DeepT2FreeAmp9
Irregular seastate - long crested - Deep water
Test nº Condition T0(s) Hs(cm) Beta1 (deg) Beta2 (deg) File name Calibration
287 Restrained 1.55 6.80 - - DeepIrregRestrained1 CalDeepIrreg1
288 Free 1.55 6.80 - - DeepIrregFree1
342 Restrained 1.55 6.80 -20.00 20.00 (two combined spectra) DeepIrregRestrained2 CalDeepIrreg2
343 Free 1.55 6.80 -20.00 20.00 (two combined spectra) DeepIrregFree2
344 Restrained 1.55 10.00 - - DeepIrregRestrained3 CalDeepIrreg3
345 Free 1.55 10.00 - - DeepIrregFree3
Free decay surge tests with one harmonic wave
depth = 0.55m
49
Test nº Condition T1 (s) A1 (cm) File name
dw(rad/s)= 0.00
295 Free 0.70 1.1 H04DecaySlowDriftT1
296 Free 0.90 1.6 H04DecaySlowDriftT2
297 Free 1.10 2.2 H04DecaySlowDriftT3
298 Free 1.15 2.3 H04DecaySlowDriftT4
299 Free 1.35 2.9 H04DecaySlowDriftT5
300 Free 1.75 4.0 H04DecaySlowDriftT6
301 Free 1.90 4.4 H04DecaySlowDriftT7
302 Free 2.00 4.7 H04DecaySlowDriftT8
303 Free 2.20 4.8 H04DecaySlowDriftT9
304 Free 1.55 3.4 H04DecaySlowDriftT10
depth = deep water
dw(rad/s)= 0.00
305 Free 0.70 1.1 DeepDecaySlowDriftT1
306 Free 0.90 1.6 DeepDecaySlowDriftT2
307 Free 1.10 2.2 DeepDecaySlowDriftT3
308 Free 1.15 2.3 DeepDecaySlowDriftT4
309 Free 1.35 2.9 DeepDecaySlowDriftT5
310 Free 1.75 4.0 DeepDecaySlowDriftT6
311 Free 1.90 4.4 DeepDecaySlowDriftT7
312 Free 2.00 4.7 DeepDecaySlowDriftT8
313 Free 2.20 4.8 DeepDecaySlowDriftT9
314 Free 1.55 3.4 DeepDecaySlowDriftT10
Tests with waves and current - same direction
RESTRAINED BODY - deep water
REGULAR WAVES - CURRENT 1 = 0.12 m/s
Current (m/s)= 0.12
Test nº Condition T1 (s) T2 (s) A1 (cm) A2 (cm) File name
dw(rad/s)= 0.00
346 Restrained 0.70 - 1.1 - DeepCurrentRestrainedU1Dw00T1
347 Restrained 1.10 - 2.2 - DeepCurrentRestrainedU1Dw00T2
348 Restrained 1.35 - 2.9 - DeepCurrentRestrainedU1Dw00T3
349 Restrained 1.90 - 4.4 - DeepCurrentRestrainedU1Dw00T4
50
350 Restrained 2.20 - 4.8 - DeepCurrentRestrainedU1Dw00T5
dw(rad/s)= 0.50
351 Restrained 0.72 0.68 1.1 1.0 DeepCurrentRestrainedU1Dw05T1
352 Restrained 1.15 1.06 2.3 2.0 DeepCurrentRestrainedU1Dw05T2
353 Restrained 1.77 1.55 4 3.4 DeepCurrentRestrainedU1Dw05T3
354 Restrained 2.23 1.9 4.8 4.4 DeepCurrentRestrainedU1Dw05T4
dw(rad/s)= 1.50
355 Restrained 0.76 0.65 1.2 0.9 DeepCurrentRestrainedU1Dw15T1
356 Restrained 1.55 1.13 3.4 2.3 DeepCurrentRestrainedU1Dw15T2
357 Restrained 2 1.36 4.7 2.9 DeepCurrentRestrainedU1Dw15T3
358 Restrained 2.46 1.55 4.8 3.4 DeepCurrentRestrainedU1Dw15T4
model with current and no waves
DeepCurrentRestrainedU1
REGULAR WAVES - CURRENT 1 = 0.06 m/s
Current (m/s)= 0.06
Test nº Condition T1 (s) T2 (s) A1 (cm) A2 (cm) filename
dw(rad/s)= 0.00
359 Restrained 0.70 - 1.1 - DeepCurrentRestrainedU2Dw00T1
360 Restrained 1.10 - 2.2 - DeepCurrentRestrainedU2Dw00T2
361 Restrained 1.35 - 2.9 - DeepCurrentRestrainedU2Dw00T3
362 Restrained 1.90 - 4.4 - DeepCurrentRestrainedU2Dw00T4
363 Restrained 2.20 - 4.8 - DeepCurrentRestrainedU2Dw00T5
dw(rad/s)= 0.50
364 Restrained 0.72 0.68 1.1 1.0 DeepCurrentRestrainedU2Dw05T1
365 Restrained 1.15 1.06 2.3 2.0 DeepCurrentRestrainedU2Dw05T2
366 Restrained 1.77 1.55 4 3.4 DeepCurrentRestrainedU2Dw05T3
367 Restrained 2.23 1.9 4.8 4.4 DeepCurrentRestrainedU2Dw05T4
dw(rad/s)= 1.50
368 Restrained 0.76 0.65 1.2 0.9 DeepCurrentRestrainedU2Dw15T1
369 Restrained 1.55 1.13 3.4 2.3 DeepCurrentRestrainedU2Dw15T2
370 Restrained 2 1.36 4.7 2.9 DeepCurrentRestrainedU2Dw15T3
371 Restrained 2.46 1.55 4.8 3.4 DeepCurrentRestrainedU2Dw15T4
model with current and no waves
51
DeepCurrentRestrainedU2
IRREGULAR WAVES - CURRENT 1
Current (m/s)= 0.12
Test nº Hs(cm) Tp(s) filename
372 10 1.55 DeepCurrentRestrainedU1Irr1
IRREGULAR WAVES - CURRENT 2
Current (m/s)= 0.06
Test nº Hs(cm) Tp(s) filename
373 10 1.55 DeepCurrentRestrainedU2Irr1
NO BODY
CURRENT
A*2 T U File name
-- -- 0.04 curr4cm-s
-- -- 0.08 curr8cm-s
-- -- 0.12 curr12cm-s
monochromatic waves
A*2 T U File name
0.05 0.57 0.08 rw+c8H0,05T0,57
0.05 0.85 0.04 rw+c4H0,05T0,85
0.05 0.85 0.08 rw+c8H0,05T0,85
0.05 0.85 0.12 rw+c12H0,05T0,85
0.05 1.13 0.08 rw+c8H0,05T1,13
0.10 0.85 0.08 rw+c8H0,10T0,85
0.10 1.13 0.04 rw+c4H0,10T1,13
0.10 1.13 0.08 rw+c8H0,10T1,13
0.10 1.13 0.12 rw+c12H0,10T1,13
0.10 1.41 0.08 rw+c8H0,10T1,41
0.15 0.99 0.08 rw+c8H0,15T0,99
0.15 1.27 0.04 rw+c4H0,15T1,27
0.15 1.27 0.08 rw+c8H0,15T1,27
0.15 1.27 0.12 rw+c12H0,15T1,27
52
0.15 1.56 0.08 rw+c8H0,15T1,56
IRREGULAR WAVES
Hs Tp U File name
0.05 0.99 -- IRRJ1
0.05 1.41 -- IRRJ2
0.05 1.98 -- IRRJ3
0.07 1.41 -- IRRJ4
0.09 0.99 -- IRRJ5
0.09 1.41 -- IRRJ6
0.09 1.98 -- IRR7
0.16 1.41 -- IRRJ8
0.16 1.98 -- IRRJ9
0.20 1.70 -- IRRJ10
0.20 1.98 -- IRRJ11
0.24 1.70 -- IRRJ12
0.24 1.98 -- IRRJ13
IRREGULAR WAVES +CURRENT
Hs Tp U File name
0.05 0.99 0.08 irrw+c8H0,05T0,99
0.05 1.41 0.08 irrw+c8H0,05T1,41
0.05 1.98 0.08 irrw+c8H0,05T1,98
0.07 1.41 0.08 irrw+c8H0,07T1,41
0.09 0.99 0.08 irrw+c8H0,09T0,99
0.09 1.41 0.08 irrw+c8H0,09T1,41
0.09 1.98 0.08 irrw+c8H0,09T1,98
0.16 1.41 0.08 irrw+c8H0,16T1,41
0.16 1.98 0.08 irrw+c8H0,16T1,98
0.20 1.70 0.08 irrw+c8H0,2T1,70
0.20 1.98 0.08 irrw+c8H0,2T1,98
0.24 1.70 0.08 irrw+c8H0,24T1,70
0.24 1.98 0.08 irrw+c8H0,24T1,98
DIRECTIONAL SPREADING (2 deg)
Hs Tp U File name
0.09 1.41 ---- sp2dg+H0,09T1,41
0.09 1.41 0.04 sp2dg+c4H0,09T1,41
0.09 1.41 0.08 sp2dg+c8H0,09T1,41
0.09 1.41 0.12 sp2dg+c12H0,09T1,41
53
DIRECTIONAL SPREADING (10 deg)
Hs Tp U File name
0.09 1.41 ---- sp10dg+H0,09T1,41
0.09 1.41 0.04 sp10dg+c4H0,09T1,41
0.09 1.41 0.08 sp10dg+c8H0,09T1,41
0.09 1.41 0.12 sp10dg+c12H0,09T1,41
TWO PEAK SPECTRA
Hs1 Tp1 Hs2 Tp2 U File name
0.05 0.99 0.05 1.98 --- 2PH0,05-0,05T0,99-1,98
0.09 0.99 0.09 1.98 --- 2PH0,09-0,09T0,99-1,98
0.05 0.99 0.09 1.98 --- 2PH0,05-0,09T0,99-1,98
0.05 1.41 0.09 0.99 ---- 2PH0,05-0,09T1,41-0,99
0.24 1.70 0.05 1.98 ---- 2PH0,24-0,05T1,70-1,98
0.2 1.70 0.07 1.98 ---- 2PH0,2-0,07T1,70-1,98
0.16 1.41 0.09 1.98 ----- 2PH0,16-0,09T1,41-1,98
TWO PEAK SPECTRA + current
Hs1 Tp1 Hs2 Tp2 U File name
0.05 0.99 0.05 1.98 0.8 2P+c8H0,05-0,05T0,99-1,98
0.09 0.99 0.09 1.98 0.8 2P+c8H0,09-0,09T0,99-1,98
0.05 0.99 0.09 1.98 0.8 2P+c8H0,05-0,09T0,99-1,98
0.05 1.41 0.09 0.99 0.8 2P+c8H0,05-0,09T1,41-0,99
0.24 1.70 0.05 1.98 0.8 2P+c8H0,24-0,05T1,70-1,98
0.2 1.70 0.07 1.98 0.8 2P+c8H0,20-0,07T1,70-1,98
0.16 1.41 0.09 1.98 0.8 2P+c8H0,16-0,09T1,41-1,98