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Advancements in Structural Research for Maritime Industry: A Comprehensive Overview

Explore current needs in structural research for maritime applications. Learn about ongoing projects and future focus areas to enhance ship structure design and materials.

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Advancements in Structural Research for Maritime Industry: A Comprehensive Overview

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  1. SNAME Annual Meeting 2011 Joint T&R Panel Session Current Needs in Structural Research – A View From the Hull Structure Committee Rick Ashcroft General Dynamics NASSCO Chair, Hull Structure Committee

  2. SNAME Involvement • SNAME is involved with research through its T&R program • The Hull Structure Committee • HS-1: Hull Loadings (Allen Engle) • HS-2: Impact Loading and Response (Greg Hermanski) • HS-3: Stress Analysis and Strength of Elements (vacant) • HS-4: Design Procedure and Philosophy (Matt Collette) • HS-7: Vibrations (Rich Sonnenschein) • HS-9: Materials (Derek Novak) • HS-12: Hull Instrumentation (Rick Ashcroft)

  3. Current HSC Projects • HS-1: Supporting the Task Group on Loads and creating Model Test Guidelines (expected release 2012) • HS-9: T&R Bulletin 2-33 A Guide to Materials Engineering for the Maritime Industry (expected release 2011)

  4. Ship Structure Committee • SNAME HSC Supports the SSC • Review proposals and recommend potential projects • Since 2001 46 projects completed • 2011: 19 proposals reviewed • 10 aluminum (strength, fatigue, welding, alloys) • Balance on load prediction, design guides, ice related • Top 5 passed to SSC for further consideration • Currently 10 projects in progress with SSC funding

  5. Current SSC Projects

  6. National Shipbuilding Research Program • SNAME also supports NSRP, providing technical experts for project oversight via Committee and Panel membership • Currently 5 major structures related NSRP Projects • Analysis and verification, welding, ice reinforcement • Also 4 smaller panel projects related to structures

  7. Linear versus Non-Linear FEA Deformation and Stress Based on Simple Linear Analysis Deformation and Stress Based on Non-Linear Analysis

  8. Current Focus of R&D Projects • Aluminum, particularly fatigue and welding related • Composites • Load prediction, particularly ice and slamming

  9. Future Research Topics • Additional focus on high strength lightweight structure of all materials • Prediction and control of welding distortion in thin steel and aluminum • Improved techniques for estimating hydrodynamic and inertial loads including something between linear and RANS • Better techniques of modeling HAZ and weld areas • Better methods of assessing ultimate strength • Validated non-linear finite element modeling techniques for typical ship structures • Composites – better definition damage tolerance and development of non-destructive inspection techniques • Real-time measurement of stress and fatigue accumulation including onset of cracks and tracking crack growth • Full scale trials to better quantify both quasi steady state and impact ice loads

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