alaska region research vessel (arrv)

Alaska Region Research Vessel

ALASKA REGION RESEARCH VESSEL(ARRV)

Design Review MeetingFebruary 2003


Key Topics• Open Water Test Results• Radiated Noise Test Results• Balancing The Design• Laboratory Arrangements• Science Equipment Outfit• Construction Cost Estimates• Design Schedule• Seward Facilities• Community Outreach


Outboard Profile


Particulars of Propulsion System Alternatives

14.614.614.6Net Buoyancy Per Lineal Foot Length (LT/FT)

0025.6Buoyancy (LT)

42.442.419.5Other Propulsion Drive Weights (LT)

99.4148.495.9Total Weight (LT)

3.552.50Weight Increase (LT)

214528002150Rated Power – ABS A1 Ice Rated (KW)

215021502150Required Power (KW)

-0.2%23.2%0.0%Margin on Required Power (%)

57106102Propulsion Unit Weight (LT)

0.243.600Required Additional Length (FT)

ROLLS-ROYCEUS305 Z-DRIVE

AC

ROLLS-ROYCEUS355 Z-DRIVE

ACAZIPODFACTOR


Basic Vessel Characteristics

Dimensions• Length, Overall ……………. 226’-0”• Length, Waterline …………. 200’-0”• Beam, Maximum …………… 52’-0”• Depth, Hull ………………….. 28’-0”• Draft, Design Waterline ……. 18’-0”• Freeboard, Main Deck …….. 10’-0”



Capacities - Consumables

• Fuel ……..………………… 148,000 gal• Potable Water …………….... 4,300 gal• SW Ballast ………..……… 200,000 gal• Provisions …………………….. 60 days• Holding Capacity ………….... 24 hours



Capacities - Science

• Science Berths ………………….. 26• Science Labs ……………….. 2,000 ft.2

• Deck Working Area ………… 2,700 ft.2

• Science Storage Volume ….. 8,000 ft.3

• Science Storage Load ….….... 100 LT



Performance

• Speed, Max. ……….. 14 kts• Speed, Cruising ……. 12 kts• Level Ice ……………. 2.5 ft• Endurance ………….. 45 days• Installed Power ……. 5,750 hp


Tasks Suggested At September Committee Meeting

• Baseline Noise SurveyüR/V Revelle, 21 November 2002üNoise Control Engineering (NCE)

• Independent Cost AnalysisüBy IMCL

• Develop Science Outfit Description/CostsüDale ChayesüTom Smith


Model Test Results: Speed vs. Power

Speed vs. Power

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0

Speed, knots

Pow

er, k

W

Calm Water Resistance

Added Resistance, SS 5Concept Estimate

14.2 kts

12.3 kts

Full power = 4300 kW


Model Test Results: Motions in SS 5

V = 0 kts V = 12 kts V = 12 kts V = 6 ktsBeam Seas Head Seas Follow'g Seas Follow'g Seas

Vertical AccelerationBow 0.08 g 0.02 g 0.19 g 0.14 g 0.20 gMidship 0.07 g 0.01 g 0.09 g 0.05 g 0.20 gStern 0.07 g 0.02 g 0.14 g 0.11 g 0.20 g

Horizontal (Lateral) AccelerationHigh Bridge Deck 0.06 g 0.10 gMid Main Deck 0.05 g 0.10 gLow Tank Top 0.04 g 0.10 g

Roll Angle (RMS Value) 3.62º 3.00º

Pitch Angle (RMS Value) 1.03º 2.86º 2.89º 1.50º

Relative Motion (RMS Value)Bow 1.15 ft 2.49 ft 8.27 ft 7.81 ftBaltic Room Door 4.20 ft 1.05 ft 1.18 ft 1.58 ftAft Working Deck, Starboard* 3.12 ft 1.61 ft 2.66 ft 1.94 ftAft Working Deck, Port 2.26 ft 0.95 ft 1.90 ft 1.44 ft

* Wave side in beam seas

CriteriaCharacteristic

Values From Model Tests


Model Test Results: Lateral Accelerations in SS 5RMS Sway Acceleration in Vessel Coordinates

-60

-40

-20

0

20

40

60

80

100

0 1 2 3 4 5 6 7 8 9 10

RMS Sway Acceleration in Vessel Coordinates (ft/sec^2)

Ele

vatio

n, R

z (f

eet)

ARRV3 With 10 L.T. Anti-Roll Tank

ARRV3 Without Anti-Roll Tank

ARRV3 With Bilge Keels

3-May-01File 00100

Lateral Acceleration Values From Model Tests


Intering Anti-Roll Tank Considerations

• Can not be arranged in double hullüExtensive structure required for ice-strengthened hull results

in excessive damping of fluid in tanküExisting fuel tank spaces would need to be used with

resultant loss of fuel capacity

• Requires approximately 90+ long tons of liquidüApproximately 20% of fuel deadweight capacity

• Only marginal improvement in motions• Tank elimination removes ability to easily heel in ice


Current Design Constraints• Cost

o MinimizeüPrincipal DimensionsüPower

• Vessel Principal Dimensionso Length – Limited by pier facility and costo Draft – Limited by operational areao Beam – Limited by resistance considerations

• Ice Capabilityo Defined by operational requirementso Defines minimum power requirement

• Enduranceo Defines fuel deadweight requirement


Main Deck Arrangement Modifications Suggested by WHOI


Project Design Schedule

N D J F M A M J J A S O N D J F M A M J J A S O N D J F M A M J J A S O N D J F2001 2002 2003 2004

M A M J J A S O N D2005

Prelim. Dsgn. Cost

Model Tests Contract Dsgn.

Prelim. Dsgn.

Model Tests Ice Rpt. Sea-keep'g Rpt.

Acoustic Survey

Ind. Cost Estimate

"Mini" Cycle Contract Design Construction

alaska region research vessel (arrv)

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