Marine Structures Research Recommendations

Recommendations for the Interagency Ship Structure Committee's FYs 1996-'97 and Later-Years Research Program

Committee on Marine Structures

Marine Board

National Research Council

NATIONAL ACADEMY PRESS
Washington, D.C.
1995



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Marine Structures Research Recommendations: Recommendations for the Interagency Ship Structure Committee's FYs 1996-'97 and Later-Years Research Program Marine Structures Research Recommendations Recommendations for the Interagency Ship Structure Committee's FYs 1996-'97 and Later-Years Research Program Committee on Marine Structures Marine Board National Research Council NATIONAL ACADEMY PRESS Washington, D.C. 1995

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Marine Structures Research Recommendations: Recommendations for the Interagency Ship Structure Committee's FYs 1996-'97 and Later-Years Research Program NOTICE: The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose members are drawn from the councils of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine. The members of the panel responsible for the report were chosen for their special competencies and with regard for appropriate balance. This report has been reviewed by a group other than the authors according to procedures approved by a Report Review Committee consisting of members of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine. The National Academy of Sciences is a private, nonprofit, self-perpetuating society of distinguished scholars engaged in scientific and engineering research, dedicated to the furtherance of science and technology and to their use for the general welfare. Upon the authority of the charter granted to it by the Congress in 1863, the Academy has a mandate that requires it to advise the federal government on scientific and technical matters. Dr. Bruce M. Alberts is president of the National Academy of Sciences. The National Academy of Engineering was established in 1964, under the charter of the National Academy of Sciences, as a parallel organization of outstanding engineers. It is autonomous in its administration and in the selection of its members, sharing with the National Academy of Sciences the responsibility for advising the federal government. The National Academy of Engineering also sponsors engineering programs aimed at meeting national needs, encourages education and research, and recognizes the superior achievements of engineers. Dr. Robert M. White is president of the National Academy of Engineering. The Institute of Medicine was established in 1970 by the National Academy of Sciences to secure the services of eminent members of appropriate professions in the examination of policy matters pertaining to the health of the public. The Institute acts under the responsibility given to the National Academy of Sciences by its congressional charter to be an adviser to the federal government and, upon its own initiative, to identify issues of medical care, research, and education. Dr. Kenneth I. Shine is president of the Institute of Medicine. The National Research Council was organized by the National Academy of Sciences in 1916 to associate the broad community of science and technology with the Academy's purposes of furthering knowledge and advising the federal government. Functioning in accordance with general policies determined by the Academy, the Council has become the principal operating agency of both the National Academy of Sciences and the National Academy of Engineering in providing services to the government, the public, and the scientific and engineering communities. The Council is administered jointly by both Academies and the Institute of Medicine. Dr. Bruce M. Alberts and Dr. Robert M. White are chairman and vice chairman, respectively, of the National Research Council. This report represents work supported under provisions of Contract DTCG23-93-C-EO1037 between the National Academy of Sciences and the U.S. Coast Guard, acting for the Ship Structure Committee. This document is disseminated under the sponsorship of the U.S. Department of Transportation in the interest of information exchange. The United States government and the Ship Structure Committee assume no liability for the contents or use thereof. Limited copies are available from Marine Board Commission on Engineering and Technical Systems National Research Council 2101 Constitution Avenue Washington, DC 20418 Additional copies are for sale from National Technical Information Service 5285 Port Royal Road Springfield, VA 22161 Copyright 1995 by the National Academy of Sciences. All rights reserved. Printed in the United States of America

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Marine Structures Research Recommendations: Recommendations for the Interagency Ship Structure Committee's FYs 1996-'97 and Later-Years Research Program COMMITTEE ON MARINE STRUCTURES The Committee on Marine Structures (CMS) provides technical projections, reviews, and advice to the interagency Ship Structure Committee (SSC) on a research program that addresses materials, design, fabrication, and inspection related to marine structures. The appendices address the relationship of the CMS, the SSC, the Ship Structure Subcommittee (SSSC), and liaison members. PETER M. PALERMO, Chair, Consultant— Naval Engineering, Alexandria, Virginia SUBRATA K. CHAKRABARTI, Chicago Bridge & Iron Company, Plainfield, Illinois BRUCE. G. COLLIPP, NAE, Consultant— Marine Engineering, Houston, Texas DALE G. KARR, University of Michigan, Ann Arbor ROGER G. KLINE, Consultant— Naval Architect, Winona, Minnesota JOHN LANDES, University of Tennessee, Knoxville ROBERT G. LOEWY, NAE, Georgia Institute of Technology, Atlanta DESIGN WORK GROUP SUBRATA K. CHAKRABARTI, Chair, Chicago Bridge & Iron Company, Plainfield, Illinois BILAL AYYUB, University of Maryland, College Park HOWARD M. BUNCH, University of Michigan, Ann Arbor OVIDE J. DAVIS, Pascagoula, Mississippi PETER A. GALE, John J. McMullen Associates, Arlington, Virginia JOHN NIEDZWECKI, Texas A&M University, College Station MARIA CELIA C. XIMENES, Chevron Shipping Company, San Francisco, California MATERIALS WORK GROUP JOHN LANDES, Chair, University of Tennessee, Knoxville DAVID P. EDMONDS, Edison Welding Institute, Columbus, Ohio JOHN F. MCINTYRE, Advanced Polymer Sciences, Avon, Ohio HAROLD S. REEMSNYDER, Bethlehem Steel Corporation, Bethlehem, Pennsylvania BARBARA A. SHAW, Pennsylvania State University, University Park JAMES M. SAWHILL, Jr., Newport News Shipbuilding, Newport News, Virginia BRUCE R. SOMERS, Lehigh University, Bethlehem, Pennsylvania JERRY G. WILLIAMS, Conoco, Inc., Ponca City, Oklahoma STAFF ROBERT A. SIELSKI, Senior Staff Officer CARLA D. MOORE, Administrative Assistant

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Marine Structures Research Recommendations: Recommendations for the Interagency Ship Structure Committee's FYs 1996-'97 and Later-Years Research Program MARINE BOARD RICHARD J. SEYMOUR, Chair, Offshore Technology Research Center, Texas A&M University, College Station JERRY A. ASPLAND, Arco Marine, Inc., Long Beach, California ANNE AYLWARD, Volpe National Transportation Systems Center, Cambridge, Massachusetts Virginia ROBERT G. BEA, NAE, University of California, Berkeley MARK Y. BERMAN, Amoco Production Co., Houston, Texas BROCK B. BERNSTEIN, EcoAnalysis, Ojai, California JOHN W. BOYLSTON, Argent Marine Operations, Inc., Solomons, Maryland SARAH CHASIS, Natural Resources Defense Council, Inc., New York, New York CHRYSSOSTOMOS CHRYSSOSTOMIDIS, Massachusetts Institute of Technology, Cambridge JAMES M. COLEMAN, NAE, Louisiana State University, Baton Rouge, Louisiana EDWARD D. GOLDBERG, NAS, Scripps Institution of Oceanography, La Jolla, California MARTHA GRABOWSKI, LeMoyne College and Rensselaer Polytechnic Institute, Cazenovia, New York ASHISH J. MEHTA, University of Florida, Gainesville M. ELISABETH PATÉ-CORNELL, Stanford University, Stanford, California DONALD W. PRITCHARD, NAE, State University of New York at Stony Brook STEPHANIE R. THORNTON, Coastal Resources Center, San Francisco, California ROD VULOVIC, Sea-Land Service, Inc., Elizabeth, New Jersey ALAN G. YOUNG, Fugro-McClelland BV, Houston, Texas STAFF CHARLES A. BOOKMAN, Director DONALD W. PERKINS, Associate Director DORIS C. HOLMES, Staff Associate

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Marine Structures Research Recommendations: Recommendations for the Interagency Ship Structure Committee's FYs 1996-'97 and Later-Years Research Program ABSTRACT This biennial report of the Marine Board's Committee on Marine Structures proposes updates to the 5-year research program of the Ship Structure Committee (SSC). The SSC is an interagency body through which the U.S. Coast Guard, Naval Sea Systems Command, Maritime Administration, Military Sealift Command, American Bureau of Shipping, Transport Canada, and Canadian Department of Defence coordinate their research on structural integrity of marine structures. The SSC's research program is intended to accommodate advanced concepts and long-range planning, as well as research in technology areas of materials criteria, loads and response, design methods, fabrication and maintenance, and reliability. The updated research program covers the fiscal years (FYs) 1995–2000. The report includes: (1) a comprehensive review of the entire research program, including work performed in FY 1994 and the rationale for new projects proposed for FY 1996, FY 1997, and outlying years; (2) detailed project descriptions for the 20 new projects proposed for the FYs 1996 and 1997; and (3) brief summaries of recently completed projects and all active or pending projects in the program. Three appendices provide detailed descriptions for projects proposed for outlying years, background on the SSC and the Committee on Marine Structures, and the approved SSC Strategic Plan. The committee's report uses four thrust areas to relate its proposed new projects to the Strategic Plan's goals and implementation strategies. The thrust areas are producibility/competitiveness, reliability, inspection/maintenance, and composites.

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Marine Structures Research Recommendations: Recommendations for the Interagency Ship Structure Committee's FYs 1996-'97 and Later-Years Research Program FOREWORD The purpose of the Ship Structure Committee (SSC) is to promote safety, economy, education, and marine environmental protection in the U.S. and Canadian maritime industry through the advancement of marine structures technology. The role of the Committee on Marine Structures (CMS) is to advise the SSC on its program of research in materials, loading, response, design, fabrication, maintenance, inspection, and repair of marine structures. On June 8, 1992, the SSC promulgated the SSC Strategic Plan, addressing national goals and SSC strategies in support of those goals. The plan provided the focus for the research projects and programs addressed herein. On May 10, 1994, the Plan was slightly modified to reflect the inclusion of two Canadian organizations as members of the SSC, Defence Research Establishment Atlantic (DREA) and Transport Canada. Each of the projects supports at least one of the SSC national goals as well as at least one of the strategies of that plan. To support these goals and associated strategies, the CMS proposes a program consisting of four specific thrust areas that will help the SSC contribute to providing a means to greatly enhance the design of ships and shipbuilding capability in North America, the inspectability and maintenance of aging ships, and the safety of ships at sea. A large number of SSC projects are related to reliability of marine structures. The failures of bulk carriers and weld cracking of structural members of Trans-Alaska Pipeline Service trade tankers are cause for concern. Under the leadership of John Landes, Chair, Materials Work Group, the CMS held a short, hands-on workshop addressing fracture assessments and the application of reliability methods to real design problems. Challenges abound in this area, and the CMS plans to address them. The results of the workshop will be incorporated in future editions of Marine Structures Research Recommendations, and may lead to a new CMS thrust area. Recognizing the strong interrelationship between materials and design, the two working groups of the CMS, the Design Working Group and the Materials Working Group, met concurrently in June 1994. This fostered enhanced communications between the two groups, which is reflected in the proposed projects for fiscal years 1996 and 1997 and later years. In addition, the committee is implementing a more systematic and documented review of finished projects. This will ensure that any necessary technology extensions are adequately identified and fully considered when future fiscal year recommendations are submitted. In November 1993, the SSC approved publishing the Marine Structures Research Recommendations on a biennial basis as a means for providing more cost-effective advice. Efforts are underway to define CMS operating procedures necessary to support biennial recommendations, while retaining the same quality of product and timeliness of research that had been achieved with annual reports. Discussions of research projects for later years that are contained in this report provide a bridge for the preparation of future biennial reports. One new member has been appointed to the CMS, Dale G. Karr, from the University of Michigan, Ann Arbor. Peter M. Palermo Chair, Committee on Marine Structures

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