Sea Based Maintenance Ship (SBMS) - MITweb.mit.edu/13a/www/DsgnSymp/SBMS.pdf · Sea Based...
Transcript of Sea Based Maintenance Ship (SBMS) - MITweb.mit.edu/13a/www/DsgnSymp/SBMS.pdf · Sea Based...
Sea Based Maintenance Ship (SBMS)
CDR Bill GreeneLCDR Kai Torkelson
LT Angelos Antonopoulos12 May 2005
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Purpose of Conversion
• Create a maintenance ship with the following capabilities:– Full I-Level maintenance support for
Marine Corps aircraft and ground vehicles and limited I-Level repair for ships.
– Expeditious deployment and transit to the Joint Operational Area (JOA).
– Conduct sustained operations in the mission area.
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Design Philosophy
• Minimize changes to baseline hull.• Priorities: 1) Air, 2) Ground, 3) Ship
Maintenance• Utilize Mobile Maintenance Facility (MMF)
concept to provide flexibility and reduce the need for large fixed shops.
• Ease of material movement via well deck, flight deck, cranes, hatches, and internal pathways.
4
Design Goals & Thresholds
50,000 lbs100,000 lbsCrane Capacity
1 LCAC2 LCACsWell Deck Capacity
1 MV-22 or 1 CH-532 MV-22 or 2 CH-53Flight Deck Capacity
9811963Maintenance Crew Berthing
10,725 ft221,450 ft2- Ship Maintenance
25,000 ft250,000 ft2- Ground Maintenance
62,500 ft2125,000 ft2- Aviation Maintenance
Maintenance Capability
ThresholdGoalMeasure of Performance
Concept of Operations
• Provide sea based I-Level maintenance support for Marine Corps air and ground vehicles and ships.
• Provide rapid deployment capability and flexible mission payload via MMF concept.
• Transportation of MEB components to and from the battlefield for repair and return to service utilizing the well deck and flight deck.
• Deploy tiger teams to repair equipment in the field or onboard other ships.
T-AVBCV-67 T-AK
LENGTH (FT) 602951 687
BEAM (FT) 90130 100
FULL LOAD DRAFT (FT) 3435 38
FULL LOAD DISPL. (LT) 23,80082,000 52,878
PROPULSION PLANT STEAMSTEAM DIESEL
SUSTAINED SPEED (KTS) 1830 19
CONVERTIBLE AREA (FT2) 80K100K 307.5K
CARGO VOLUME (FT3) 100K200K 2,000K
TROOPS NA2,480 NA
LCAC 00 0
LANDING SPOTS 1AIR WING 0
BERTHING CAPACITY 3665,597 366
COSTS ConversionConversion MSC charter and Conversion
CREW 3663,117 366
Ship Tradeoff Study
LMSR
951
106
30
63,000
DIESEL
22
397.4K
3,537K
300
1
2
395
Conversion
95
LPD-17 LHD AS-39
LENGTH (FT) 684 844 644
BEAM (FT) 97 106 85
FULL LOAD DRAFT (FT) 23 27 30
FULL LOAD DISPL. (LT) 22,000 40,500 23,000
PROPULSION PLANT DIESEL STEAM * STEAM
SUSTAINED SPEED (KTS) 22 22 20
CONVERTIBLE AREA (FT2) 45K 21K 16K
CARGO VOLUME (FT3) 25K 125K 80K
TROOPS 723 1,687 NA
LCAC 2 3 4
LANDING SPOTS 4 9 1
BERTHING CAPACITY 1,202 2,934 1,363
COSTS Conversion Conversion Conversion
CREW 396 1,247 1,363
Ship Tradeoff Study (continued)
LHA
834
106
27
39,400
STEAM
22
34K
117K
1,710
1
10
2,914
Conversion
1,204
* LHD 8 will have gas turbine propulsion.
Platform Selection
T-AVBAS-39
LHDLHA LPD-17 STD
LMSR
CV-67
T-AK
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Ease of Conversion Factor
Overall M
easure o
f Effectiven
ess
OptimumPoint
ParetoFrontier
Conversion Design Space and Pareto Frontier
Platform Selection
T-AVBAS-39
LHDLHA LPD-17 STD
LMSR
CV-67
T-AK
LPD-17 STRETCH
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Ease of Conversion Factor
Overall M
easure o
f Effectiven
ess
ParetoFrontier
OptimumPoint
SelectedCandidate
Conversion Design Space and Pareto Frontier
Concept Design
SBMS Conversion from LPD-17
SBMSSBMS--11
AVIATION MAINTENANCE
VEHICLE MAINTENANCE
BALLAST TANKS
ELECTRONICS
MACHINERY SPACES
MESS SPACE
CONVERTED LIVING SPACES
STORESWELL DECK
45M HULL INSERT
LIVING SPACES
LIVING SPACES
Arrangements
Cross Section at Bulkhead 11 Looking Aft
AviationMaintenance
GroundMaintenance
ShipMaintenance
AviationMaintenance
Hangar
Arrangements
Main Deck
DeckhouseExtension
Hull Insert
No Change
No Change
LogisticsHatch
Heavy LiftCrane
CargoElevator
Light Crane
Aviation Maintenance Area
Aft Forward
Flight D
eck
Hull Insert Effects
Original LPD-17
SBMS MMR’s AMR’s
Structural AnalysisStillwaterMax Bending Moment 120,051H mMTDeck Stress 45 N/mm2
Keel Stress -39 N/mm2
Hogging
Max Bending Moment 244,067H mMTDeck Stress 91 N/mm2
Keel Stress -80 N/mm2
Sagging
Max Bending Moment 51,195S mMTDeck Stress -19 N/mm2
Keel Stress 17 N/mm2
•Appropriate limit for primary bending stress for HTS was found to be Fb = 131 N/mm2 : Analysis Successful
Intact Stability
High Speed Turn
Equilibrium Angle: 0o Required <15.0o
Maximum Righting Arm: 7.971m Required >0.059m
Reserve Area: 5 m-rad Required >0.46 m-rad
REQUIREMENTS MET
Wind Heel
Wind Heel Angle: 2o
Maximum Righting Arm: 8.045m Required >0.707m
Reserve Area: 5 m-rad Required >2 m-rad
REQUIREMENTS MET
Damaged Stability
0608.39616-17-18-19-20-21
1618.36315-16-17-18-19-20
2618.65013-14-15-16-17-18
3618.81712-13-14-15-16
3628.91911-12-13-14
3628.86410-11-12
3638.2709-10-11
2648.5068-9-10
3648.3777-8-9
3628.2815-6-7-8
2608.3314-5-6-7
0608.3963-4-5-6
0628.5551-2-3-4
Angle(deg)Max GZ(deg)Compartments
Flooded
Static HeelAngle at GZ (m)
Full LoadDamagedCondition
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Design Summary
152,698117,000AVAILABLE VOLUME, m3
129,45797,000REQUIRED VOLUME, m3
35,26925,000AVAILABLE AREA, m2
35,01825,800REQUIRED AREA, m2
15,40015,400SHAFT POWER, KW
9,0009,530ENDURANCE AT 20KTS, nm
20.923.1MAX SPEED, kts
19.722.1SUST SPEED, kts
0.9410.941CX
0.7120.647CP
11.510.7GMT
19.219.2DEPTH, m
29.529.5BEAM, m
245200LBP, m
SBMSLPD-17 Original
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Performance Summary
50,000 lbs110,000 lbs100,000 lbsCrane Capacity
1 LCAC2 LCACs2 LCACsWell Deck Capacity
1 MV-22 or 1 CH-53
2 MV-22 or 2 CH-53
2 MV-22 or 2 CH-53
Flight Deck Capacity
9819901963Maintenance Crew Berthing
10,725 ft211,457 ft2 *21,450 ft2- Ship Maintenance
25,000 ft232,884 ft250,000 ft2- Ground Maintenance
62,500 ft281,204 ft2125,000 ft2- Aviation Maintenance
Maintenance Capability
ThresholdSBMS DesignGoalMeasure of Performance
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Conclusions & Recommendations
• Well Deck capability critical.• Modified Repeat Amphib vs. “Big Box”
conversion.• The MMF should be explored for other
maintenance applications.• Next design iteration should study
maintenance throughput requirements.
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Questions??
SBMSSBMS--11