dessc replacement hov update - unols · dessc replacement hov update november 2006 ... • abs has...
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![Page 1: DESSC Replacement HOV Update - UNOLS · DESSC Replacement HOV Update November 2006 ... • ABS has approved specifications ... • Ingot Material Specification](https://reader031.vdocuments.net/reader031/viewer/2022021505/5ae231607f8b9a495c8bc2ce/html5/thumbnails/1.jpg)
DESSCNovember 2006
Replacement HOV Update
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DESSCNovember 2006Replacement HOV Update
Science Improvements
• Improved fields of view• Increased depth capability• Increased bottom time• Automated position-keeping in all axes• Improved interior ergonomics• Increased interior electronics and science payload• Reduced physical & chemical disturbances
to science study areas
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DESSCNovember 2006Replacement HOV Update
Milestone History
• 31 July 2004 – NSF Cooperative Agreement awarded
• 1 Oct 2004 – Acquisition consultant retained (Perot Systems Government Services)
• May 2005 – Request for Proposal (RFP) from Southwest Research Institute (SwRI) for personnel sphere design approved by NSF
• 1 November 2005 – Contract with SwRI signed
• 1 Dec 2005 – Personnel sphere design kick-off meeting
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DESSCNovember 2006
To address areas of higher risk the project has been broken into two phases:
• Phase One– Design and forging of personnel sphere– Feasibility testing for prospective energy system– Qualification testing for syntactic buoyancy foam
• Phase Two– Completion of personnel sphere– Design and fabrication of remaining vehicle
Replacement HOV Update
Risk Management
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DESSCNovember 2006Replacement HOV Update
Syntactic Foam Testing and Certification
• Test and fabrication specifications developed• ABS has approved specifications• 32 lb/ft3 foam (single size balloon) developed• 30 lb/ft3 foam (DS-30-5000 M) developed• Continue development of lower density foam w/ 30 lb/ft3
as target• Additional manufacturer is starting R&D to produce a
30 lb/ft3 foam
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DESSCNovember 2006Replacement HOV Update
Batteries
• Evaluated current designs & efforts (Li polymer & Li ion)
LTC UltralifeSKC LithionKokam ElectrovayaGS Battery
• Scaled battery assemblies for Kokam and LTC • Baseline and environmental performance testing and
safety testing • Received environmental test results for Bluefin 1.5 kWh Li
battery module
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DESSCNovember 2006Replacement HOV Update
Alternative Solutions to Select ABS Rules
• Alternative oxygen storage solution • Normal ballast system actuation • External mechanical pressure monitoring• Means for equalizing pressure across hatch• Hand operated hydraulic pump
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DESSCNovember 2006Replacement HOV Update
Personnel Sphere Design
Status
• Preliminary trade studies and analyses completed
• Material (Ti 6 Al-4 V ELI) characterization complete
• Contract let for titanium purchase
• Design reports for Preliminary Design Review (PDR) under review by WHOI, ABS, NAVSEA
• PDR scheduled for early Dec 2006
• Bids for forging and fabrication due at PDR
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DESSCNovember 2006Replacement HOV Update
Preliminary Design Review - Documents
• Hull Thickness Design Calculation Report
• Ingot Material Specification
• Forging Production Specification
• Hull Thickness Design calculation report
• Hull Penetration Design & Analysis Report
• EB & GTAW Welding & Qualification Specification
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DESSCNovember 2006Replacement HOV Update
Baseline Penetrator Tradeoff Study
16 Penetrations
• 5 Electrical
• 5 Fiber Optic
• 6 Expansion
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DESSCNovember 2006Replacement HOV Update
Viewport Reinforcement FEA
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DESSCNovember 2006Replacement HOV Update
Notional Frame to Hull Lug Reaction Analysis
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DESSCNovember 2006Replacement HOV Update
Finite Element Structural Analysis of Sea Cliff
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DESSCNovember 2006Replacement HOV Update
Pre-production Material Characterization Test Report
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DESSCNovember 2006Replacement HOV Update
Structural Analysis of Hatch Reinforcement
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DESSCNovember 2006Replacement HOV Update
Manufacturing Assembly Plan
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DESSCNovember 2006Replacement HOV Update
Manufacturing Assembly Plan
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DESSCNovember 2006Replacement HOV Update
U.S. Navy Involvement
Review of:
• Material characteristic test results
• FEA of the replacement HOV and Sea Cliff
• Proof test and strain gage plan
• Establishment of the hull creep stress design criteria
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DESSCNovember 2006Replacement HOV Update
Window Fields of View
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DESSCNovember 2006Replacement HOV Update
Vehicle Design
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DESSCNovember 2006Replacement HOV Update
Window Size and Number ComparisonWindow Size & Number
5-6-7-6-5 6-7-6 5-7-7-7-5 7-7-7
Viewport System Total Cost ($)
$758k -$1012k
$485 - $643k
? $273k less to $369k less
$764k -$1000k
? $6k more to $12k less
$466k -$624k
? $292 less to $388k less
Total Weight (Viewport System & Syntactic Foam) (lbs) *
348 222
?126 less
366
?18 more
318
? 30 less
Syntactic Volume (ft3)
10.9 6.9? 4 less
11.4? 0.5 more
9.9? 1 less
Summary Specified in contract
Minimum weight
Most viewing area
Least expensive
* Syntactic foam required to compensate forviewport system weight assumes a 32 lb/ft3 density.
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DESSCNovember 2006Replacement HOV Update
Side Window Evaluation
Pros
• Increased area for observation
• More effective search
• Increased area for sampling
• Closer view of seafloor/ sediment
• Allows for monitoring proximity to hazards on side of vehicle
Cons
• Increased exposure to hazards on side of vehicle
• Questionable actual usage
• Manipulator mount complexity and weight
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DESSCNovember 2006Replacement HOV Update
Three 7” Windows Evaluation
Pros
• Small increase in field of view
• Increased ease of use
• Simpler logistics (one size vs. two)
Cons
• Small increase in vehicle weight
• Small increase in vehicle volume
• Small increase in fabrication complexity
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DESSCNovember 2006Replacement HOV Update
Vehicle Design• Request for Information (RFI) released April 2006
• Responses (Statement of Interest) received from:• General Dynamics• Oceaneering• Northrop Grumman• Lockheed Martin• Battelle Memorial Institute• Oceanworks (& ISE)
• Industry Day held on Atlantis 1 Aug 2006
• Request for Proposals (RFP) issued 2 Nov 2006
• Responses due 4 Jan 2007
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DESSCNovember 2006Replacement HOV Update
Alvin Prototyping
• Inertial Navigation System
• Fiber Optic Penetrator
• Shaped Memory Alloy Releases
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DESSCNovember 2006Replacement HOV Update
Schedule
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DESSCNovember 2006Replacement HOV Update
Thank You
This material is based on work supported by the
National Science Foundation
under Grant No. OCE-0433409