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TMR4225MARINE OPERATIONS

SPRING 2007

Introduction

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Introductory issues

• Aim

• Schedule for lectures– Time and topics

– Monologue versus dialogue

• Written material

• Language

• Exercises

• Plan and assistance

• Exam

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General course information

• Lecturers:– Professor II Finn Gunnar Nielsen, Norsk Hydro Research Centre,

Bergen• E-mail : finn.gunnar.nielsen@hydro.com

– Professor II Tor Einar Berg, Marintek• E-mail: toreinar.berg@marintek.sintef.no

• Assistant:– TBN

• Exercises: Approx. 6 – Min. 4 required for exam. – One exercise / project will be graded and count 30% in the final grading.

• Web site: http://www.ivt.ntnu.no/imt/courses/tmr4225/

• EXAM: Wednesday 6 June

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Web sitehttp://www.ivt.ntnu.no/imt/courses/tmr4225/

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AIM

• Give overview and physical insight into typical marine operations related to offshore activities.

• Learn how to make order of magnitude estimates of loads and responses.

• Understand background for more advanced numerical methods.

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Marine operations. Themes

• Temporary duration– Towing

– Lifting

– Launching

– Pipelaying

– Bottom surveys

– ROV operations

– Spill recovery

– ….

• Weather limitation– Dynamics

– Operability

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Literature

• Nielsen, F.G.: "Marine Operations. Lecture Notes" (Jan. 2007)

• Berg, T. E.: ."Marine Operations - Subsea Vehicles. Lecture Notes“

• Faltinsen, O.M. "Sealoads on Ships and Offshore Structures

• Handouts.

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Schedule (1:2)

Week No.

Lect. No.

Date Topic Content

2

1

Thurs.11.01

Introduction, Underwater vehicles

Introduction to the course. Examples of marine operations and UV manoeuvring. Examples of submarines, ROVs and AUVs. Work tasks for ROVs and AUVs in offshore operations.

4 2

Wedn. 24.01

AUV /ROV AUV hydrodynamics and Hugin operational experience.

4 3

Thurs. 25.01

Rules & Planning.

Overview of rules and regulations. Criteria for operation. Weather windows. Simulation of operations.

5 4

Wedn 31.01

Towing. Towing. Propeller forces. Towlines, restoring forces, dynamic loads.

5 5

Thurs. 01.02

Crane operations

Examples of heavy lift vessels and operations. Multi-body dynamics. Static and dynamic response of simple systems.

6 7

6 Wedn. 14.02

Crane operations

Lifting in deep water. Wire dynamics. Advanced simulation tools.

7 7

Thurs. 15.02

Crane dynamics

Dynamics of a body hanging above and in water. Mathieu instability. Heave compensation.

8 8

Thurs. 22.02

Dynamic stability

Hydrodynamics of ROV. Directional stability

9 “Tiltaksuke” 10 “Tiltaksuke”

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11 9

Thurs. 15.03

ROV Simulation of ROV operations and ROV pilot training

12 10

Wedn. 21.03

Water entry. Hydrodynamic forces on a body crossing the wave zone and close to bottom. Hydrodynamic coefficients.

12 11

Thurs. 22.03

Water entry. Hydrodynamic coefficients continued. Effect of perforation.

13 14 Easter 15

12 Thurs.12.04

Project presentations

Project Due. Short oral presentations of “project exercises”.

16 17

13 Wedn. 25.04

Water entry Dynamics during crossing splash zone. Examples

17 14

Thurs. 26.04

Statistics. Pipelaying. Summary

The probability of snap loads / impact during lift off Pipelaying in deep water. Summary of course, feedback.

23

Wedn 06.06

EXAM

Schedule (2:2)

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Time and place for lectures

Lecture no. Date Time Place Lecturer 1 Thurs.11.01 1015 –1300 T1 FGN / TEB 2 Wedn. 24.01 1515 –1800 T2 TEB 3 Thurs .25.01 1015 –1300 T1 FGN 4 Wedn. 31.01 1515 –1800 T2 FGN 5 Thurs. 01.02 1015 –1300 T1 FGN 6 Wedn. 14.02 1515 –1800 T2 FGN 7 Thurs. 15.02 1015 –1300 T1 FGN 8 Thurs. 22.02 1015 –1300 T1 TEB 9 Thurs. 15.03 1015 –1300 T1 TEB

10 Wedn. 21.03 1515 –1800 T2 FGN 11 Thurs. 22.03 1015 –1300 T1 FGN 12 Thurs. 12.04 1015 –1300 T1 FGN/TEB/All 13 Wedn. 25.04 1515 –1800 T2 FGN 14 Thurs. 26.04 1015 –1300 T1 FGN

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Exercise Week Topic Given Due ___No._____No.________________________________________________(Week No.)____ 1 3 AUV hydrodynamics 5 2 5 Towing 7 3 7 Crane dynamics 11 13.02 27.02 4 11 ROV hydrodynamics 13 5 13 Water entry 15 6 15 Crane dynamics 17 “Project Exercise”, Mandatory group work: Starts week 8 ends week 15.

PRELIMINARY LIST OF EXERCISES:

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Marine operations - challenges

• Deep water

• More subsea equipment

• Requirements on costs and regularity

• Harsh environment– Heavy seas

– Arctic environment

• Needed: people with knowledge about– Dynamics

– System modelling

– Statistics

– Current practice