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Ship Structure Committee

Ship Structure Committee. An Interagency Research and Development Committee for Safer Ship Structures. It Happened on My Watch; a Retrospective of the SSC. Foundation.

melinda-dillon
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Ship Structure Committee

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  1. Ship Structure Committee An Interagency Research and Development Committee for Safer Ship Structures It Happened on My Watch; a Retrospective of the SSC

  2. Foundation • In the early 1940’s, twenty eight merchant ships had suffered critical structural casualties. Two had broken in two pieces, and four had suffered complete fractures of the strength deck.

  3. Foundation • The Board consisted of US Coast Guard, US Navy Bureau of Ships, US Maritime Commission, and American Bureau of Shipping. The final report of the Board was dated 15 July 146, and included studies of 132 major structural ship casualties.

  4. Creation • The final recommendation of the Board was as follows: “Finally it is recommended that an organization be established to formulate and coordinate research in matters pertaining to ship structure in the same manner as has been the practice during the tenure of the Board.”

  5. Creation • Accordingly on 25 July 1946, the Acting Secretary of the Treasury, Mr. E.H. Foley, Jr. established the Ship Structure Committee, with the same general membership as that of the original Board. Lead by a Coast Guard Commander

  6. Mission • To enhance the performance of ship structures and the safety of life at sea, promote technology and educational advancements in marine transportation and protect the marine environment through research and development projects.

  7. Over 60 Years of History 2006 1966 2016 1996 1946 1956 1976 1986 Failure of Liberty Ships Transition temperatures effect of edge preparations Fatigue failure in new high strength steel vessels Oil pollution prevention failure mechanisms 60th Anniversary Aluminum structure Ballast water treatment structural damage Mechanical, chemical, & physical metallurgy geometry of structural members Catamarans dynamically supported vessels cryogenic product full transverse fracture 50th Anniversary Life cycle risk management

  8. Roles & Responsibilities • SSC Co-Chair • CG-5P – RDML Servidio - Asst. Commandant for Prevention Policy • SEA 05 – RDML Fuller - NAVSEA’s Deputy Commander Ship Design, Integration and Naval Engineering Naval Sea Systems Command • SSC Administration • Executive Director, LT Joshua A. Kapusta • Administrative Assistant , Ms. Jeannette Grant • Principal Members • Executive Group Members • Sub-Committee Members

  9. ABS Principal Members of the SSC • American Bureau of Shipping • Defence Research and Development Canada - Atlantic • Maritime Administration • Military Sealift Command • Naval Sea Systems Command • Office of Naval Research • Transport Canada • Society of Naval Architects and Marine Engineers • USCG Commercial Vessel Engineering • USCG Fleet Engineering

  10. www. shipstructure.org

  11. Web Trends & Analysis

  12. Impact & Relevance • Top 20 Statistics • AL & Composite Structures • Fatigue & Fracture • Design Criteria, Standards & Loads • Weld, Fabrication & Fastening • FEA • 59% of all report downloads were published in last 10 years **Statistics calculated through 2013.

  13. Impact & Relevance Domestic & International regulation projects that have benefitted: High Speed Craft NVIC – marine composite and Aluminum structures, fatigue analyses, inspection techniques IMO POLAR Code – Ice impacts (direct and glancing blows), Ice flow studies, structural impacts to operating in harsh environments IMO Return to Port guidelines – Reliability based structural damage assessment studies Sustainability– Lightweight construction and repair Recent projects include: 1. Inspection Technique for Marine Composite Construction 2. Design and Detailing for High Speed Aluminum Vessels Design 3. Structural Challenges Faced by Arctic Ships 4. Predictive Modeling Impact of Ice on Ship and Offshore Structures 5. Development of a Structural Health Monitoring Prototype for Ship Structures

  14. 1940s • Formed based on a recommendation of the Board of Investigation studying the brittle fracture of the Liberty Ships. • Continued research in Ship Structures

  15. 1950s • mechanical metallurgy • chemical & physical metallurgy

  16. 1960s • geometry of structural members • transition temperatures • effect of edge preparations

  17. 1970s • new designs - new structural concerns • catamarans • dynamically supported vessels • cryogenic product • full transverse fracture • ITB MARTHA INGRAM broke in two (brittle) • Mineral Management Service added • First Symposium with SNAME!

  18. 1980s • fatigue failure in new high strength steel vessels • oil pollution prevention • failure mechanisms and their abatement • Mineral Management Service left • OBO DERBYSHIRE

  19. 1990s • reliability based ship design • improved structural detail design • welding practices • inspection techniques • investigate expanded use of composite materials • MSC CARLA • Canada joins • SNAME joins as full member

  20. 2000s • reliability/risk methodologies • human element in ship design • high speed vessels • crashworthiness of ship structures

  21. 2010s • Fatigue analysis and design • Aluminum & Composites • Structural Hull Monitoring • Ice interaction and arctic operations

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