Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical Engineering
Concept Design for a Strike Littoral Intelligence Surveillance and Reconnaissance Submarine
SLĪSR
Ship Design and Technology Symposium
CDR John CampbellLCDR Greg Crawford
LT Eric Thurkins
27 April 2012
Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical EngineeringAcknowledgements
27 April 2012 SLISR 2
• NAVSEA 05U– Stu Mennitt– Mark Arvidson
• NUWC Newport– John Babb
• OPNAV N87– Captain Dave Goggins
• Government Support Contractors – Jim Dullea – Orbis Inc.– Ray Shoaff – Shoaff Consulting Services, Inc.– Noel Tessier – Engineered Syntactic Systems– David Gillingham – Institute for Defense
Analysis
• Portsmouth Naval Shipyard– Captain David Hunt C300– Mike Desjardins C1100– Marc Baillargeon C900– Tim Comtois C964– Paul Bedard C964
Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical Engineering
Customer Requirements and Assumptions
Customer Requirements Major Assumptions
•Able to Accomplish All SSN Mission Sets
•Modular Construction Techniques Utilized
•Cost Requirements Based On FY-12 Dollars
•Nuclear Powerplant Treated as a “Black Box”
3
Threshold Objective
Speed 25 32
Crew Size 156 110
Crew accommodations
90% of crew size
100% of crew size
SOF CapabilityNo Lockout chamber
Integrated Lockout chamber
Endurance 90 days 120 days
Max Operating Depth
80% of VIRGINIA
100% of VIRGINIA
Hull Diameter 34 feet 28 feet
27 April 2012 SLISR
Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical Engineering
Design Approach and Decision Framework
• Design Approach– Payload Modularity– Cost and Risk
Mitigation/Minimization– Innovation of Design
• Decision Parameters– Minimum Hull Dia. 28’– Maximum Hull Dia. 34’– Pressure Hull Right
Circular Ring Stiffened Cylinder
– Payload Modular Tube (PMT) Concept
• Evaluation Criteria– Grounding Capability– Pressure Hull Material– Sail design (or none)– PMT orientation– Power plant– Emergency power– Control Planes
27 April 2012 SLISR 4
Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical EngineeringResults Summary
5
Threshold Objective SLISRSpeed (knots) 25 32 31Crew Size 156 110 147
Crew accommodations 90% of crew size 100% crew size 100% crew size
SOF Capability No Lockout chamberIntegrated Lockout
chamberPMT Embedded Lockout Chamber (when loaded)
Endurance 90 days 120 days 90 daysMax Operating Depth 80% of VIRGINIA 100% of VIRGINIA >100% of VIRGINIA
Pressure Hull Diameter 34 feet 28 feet 34 feetEstimated Acquisition
Cost2.7 B$ (FY12) 2.0 B$ (FY12) 2.44 B$ (FY12)
27 April 2012 SLISR
Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical EngineeringPMT Design Details
• Size of VIRGINIA block III
• Access from PH
• Connections– Data– Power– Hydraulic– Pneumatic
627 April 2012 SLISR
Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical EngineeringStern Configuration
• Rim-Driven Propulsors (RDP)– Modeled on tested
RDPs by EB, PSU and Hamburg Model Basin
– Partially embedded– 18 MW max power
each (supplied 16 MW actual)
– 0.721 Propulsive Coefficient
727 April 2012 SLISR
Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical Engineering
Envelope / Powering and Resistance
827 April 2012 SLISR
Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical EngineeringExternal Arrangements
927 April 2012 SLISR
Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical EngineeringExternal Arrangements
1027 April 2012 SLISR
Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical EngineeringExtensible Bridge
1127 April 2012 SLISR
Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical EngineeringExtensible Bridge
1227 April 2012 SLISR
Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical EngineeringForward Arrangements
13
FCUL
FCLLFCML
Bridge AccessReconfigurable
Berthing
27 April 2012 SLISR
FWD
Ship’sOffice
3-inchLauncher
WRSRs
Crew Berthing
Crew Berthing
HabitabilityFan Room
CPO Berthing
DieselGenerator
Radio
Control
COSRCrew’sMess
Galley
Aux 4
Aux 3 Wardroom
Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical EngineeringReconfigurable Berthing
1427 April 2012 SLISR
Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical EngineeringReconfigurable Berthing
15
2 4
12
DOOR
DOOR
DOOR
Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical EngineeringReconfigurable Berthing
16
14
DOOR
DOOR
DOOR
4
Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical EngineeringForward Arrangements
17
6
12
DOOR
DOOR
DOOR
Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical EngineeringForward Arrangements
18
10
8
DOOR
DOOR
DOOR
Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical EngineeringEngineering Plant
19
TurbineGenerator
TurbineGenerator
LET
Maneuvering
RDPMotor
Controllers
RDPFilters
Switchboards
Switchboards
ReactorInstrumentation
TurbineGenerator
TurbineGenerator
Switchboards
Switchboards
AC Unit
AC Unit
HPAC
HPAC
Main Condenser
Lab
27 April 2012 SLISR
Reserve Feed Tank
Reserve Feed Tank
Ship ServiceHydraulics
PPFW HX
PPFW HX
HotwellReverse
Osmosis Units
MSWPump
MSWPump
FeedPumps
PPFWPump
PPFWPump
FWD
Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical EngineeringSurfaced Trim and Stability
• Draft - 26.6 ft.
• Trim - 4.94 ft. by the stern (1.15o)
• GMt - 5.21 ft.
• Roll Period - 9.68 sec
2027 April 2012 SLISR
Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical EngineeringPayload Fraction
2127 April 2012 SLISR
Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical EngineeringWeight and Cost
22
A‐1 Weight 5932 LT
Lead (Fraction of A‐1) 574 LT (9.7%)
A weight 6506 LT
Variable Load 616 LT
NSC 7122 LT
MBT (% Reserve Buoyancy)
1211 LT (17%)
Submerged Displacement
8333 LT
Free Flood Volume 1150 LT
Envelope Displacement
9483 LT
Service Life 30 years
Initial Operating Capability
2025
Total Ship Acquisition
20
Production Rate 1 per year
Base Fiscal Year 2012
Inflation Rate 3.5%
Builder Profit 13%
Lead Ship Acquisition Cost
$2.44B27 April 2012 SLISR
Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical Engineering
Conclusions and Areas for Further Study
23
• Unique and Capable Platform, Mission Ready• Stack Length Reduction through:
– Elimination of Torpedo Room– Use of External RIM Driven Propulsors
• Sail Elimination Reduced Drag– More Efficient Propulsion– Use of an Extensible Bridge
• Mixed Gender Berthing Issue Solved• Payload Fraction Improvement
• Additional Large Scale Hydrodynamic Analysis Necessary• Refine “Slab-Sided” Non-Pressure Hull • Redesign of Stern Section to Enhance Manufacturability27 April 2012 SLISR
Center for Ocean EngineeringNaval Construction & Engineering ProgramDepartment of Mechanical Engineering
Questions?
24
