Two of the maritime industry's internationally respected organizations are sponsoring a two-day Extreme Loads Response Symposium to be held October 19-20 at the Sheraton National Hotel, Arlington, Va.

The symposium is being arranged by the interagency Ship Structure Committee and The Society of Naval Architects and Marine Engineers (SNAME). It is the third in an extremely successful series of conferences the organizations have sponsored starting with a ship structures symposium in 1975. The second technical symposium, held in 1975, was concerned with ship vibration.

The Extreme Loads Response Symposium brings together more than 400 representatives from the maritime community, including shipowners, operators, builders, designers, researchers, government agencies, and classification society officials, to discuss all aspects of structural response under extreme loadings.

The nine technical sessions will feature papers covering a broad range of topics including load definition, response assessment, materials properties, fabrication requirements, reliability, design criteria, design methods, and service performance.

According to John B. O'Brien, chairman of the symposium, "In recent years, the statistical nature of structural loadings and responses has become better understood and means for consideration in the design process developed." The high cost of shipbuilding and repair, he said, require that full advantage be taken of this knowledge and its related technology in future ship designs. "It is timely that the problems of extremes and available technology for their treatment be exposed and discussed in an open forum."

The technical program will begin with welcoming remarks by chairman O'Brien, John J. Nachtsheim, president of SNAME, and Rear Adm. C.T. Lusk Jr. of the U.S. Coast Guard.

The symposium banquet will be held at 7 p.m. on Monday, October 19, at which Judge Charles S. Haight Jr. of the U.S. District Court will be the featured speaker. He will treat the subject of the engineer as an expert witness.

John Vasta, a well-known and respected structural engineer, will be honored at Monday's luncheon for his contributions to the disciplines involved in shipbuilding. The volume of technical papers and discussions to be published after the symposium also will be dedicated to Mr. Vasta.

The technical program was organized by Walter Maclean. The members of the arrangement committee were: William S. Siekierka, Richard W. Rumke, Theodore W. Chapman, James A. Sanial Jr., Trevor Lewis-Jones, and David B. Anderson.

The Ship Structure Committee is the standing U.S. interagency committee whose responsibility is to conduct a research program to improve the design, materials, and construction of ships and marine structures. Its members are: U.S. Coast Guard, Naval Sea Systems Command, Military Sealift Command, Maritime Administration, American Bureau of Shipping, and the U.S. Geological Survey.

EXTREME LOADS RESPONSE SYMPOSIUM 1981 — TECHNICAL PROGRAM

Monday, October 19

Welcome — John B. O'Brien, Head, Surface Ship Structures Branch, Naval Sea Systems Command; John J. Nachtsheim, President, Society of Naval Architects and Marine Engineers; Rear Adm. C.T. Lusk Jr., USCG

SESSION I—Presiding Officer, John B. O'Brien, Naval Sea Systems Command; Assistant, Frank J. Slyker, Bethlehem Steel Corporation A. Extreme Loads in Navy Ship Design—Capt. Myron Ricketts, William J. Siekierka, Naval Sea Systems Command B. The Consequences of Extreme Loading on Ship Structures—Richard J. Burke, U.S. Salvage Association

SESSION II—Presiding Officer, Stanley G. Stiansen, American Bureau of Shipping; Assistant, Naresh Maniar, M. Rosenblatt & Sons C. Principles of Extreme Value Statistics and Their Applications — Michel K. Ochi, University of Florida D. Predicting Hull Bending Moments for Design—Edward V. Lewis, Consultant; Robert B. Zubaly, State University of New York Maritime College E. Combining Extreme Environmental Loads for Reliability-Based Designs—Alaa Mansour, University of California, Berkeley

SESSION III—Presiding Officer, Capt. Richard I. Brown, U.S. Coast Guard; Assistant, Frank H. Sellars, MPR Associates F. Progress in the Development of Structural Load Criteria for Extreme Waves—William H. Buckley, Alexander B. Stavovy, David W. Taylor Naval Ship Research and Development Center

SESSION IV—Presiding Officer, Peter M. Palermo, Naval Sea Systems Command; Assistant, Ivan Mertl, J.J. McMullen Associates, Inc. G. Fatigue Analysis Method for LNG Membrane Tank Details — M. Huther, F. Benoit, J. Poudret, Bureau Veritas H. Structural Failure of a Small Cargo Vessel Among Rough Seas — Yoshiyuki Yamamoto, Hideomi Ohtsubo, Yu Takeda, Toichi Fukasawa, University of Tokyo

SESSION V—Presiding Officer, Donald Stein, Military Sea Lift Command; Assistant, Alfred L. Dinsenbacher, David W. Taylor Naval Ship Research and Development Center I. Overall Structural Response of a Ship Struck in a Collision—Karl A. Reckling, Technische Universitat Berlin J. Grounding of a Membrane Tanker — Correlation Between Damage Predictions and Observations — J. Poudret, M. Huther, Bureau Veritas; P. Jean, Gaz Transport Engineering; H. Vaughan, University of British Columbia

Tuesday, October 20

SESSION VI—Presiding Officer, Price McDonaldson, U.S. Geological Survey; Assistant, Charles Jordan, Newport News Shipbuilding K. Evaluation of Ultimate Ship Hull Strength — R.S. Dow, R.C. Hugill, J.D. Clark, C.S. Smith, Admiralty Marine Technology Establishment L. Strength of Ship Hull Girders under Moment, Shear and Torque — Alexis Ostapenko, Lehigh University

SESSION VII — Presiding Officer, James G. Gross, Maritime Administration; Assistant, Irving L. Stern, American Bureau of Shipping M. Selection of Structural Materials for Extreme Loads Environments—Robert H. Stern Jr., Lukens Steel Co. N. Fracture Characteristics of Ship Steels Under Extremely High Loading Rates—A.K. Shoemaker, U.S. Steel Corporation Research Laboratory O. Some Extreme Effects of Residual Stresses in Shipbuilding — Alfred H. Wells Jr., Newport News Shipbuilding

SESSION VIII — Presiding Officer, Capt. J. Richard Gauthey, USN, Naval Sea Systems Command; Assistant, Roger G. Kline, R.A. Stearn, Inc. P. Offshore Structures — Implementation of Reliability—Olav Furnes, Arne Sele, Det norske Veritas Q. Semi-Probabilistic Approach to Design of Marine Structures — D. Faulkner, The University (Glasgow)

SESSION IX—Presiding Officer, William M. Hannon, American Bureau of Shipping; Assistant, Paul R. Van Mater Jr., Band, Lavis Associates R. Fatigue Criteria for Ship Structure Details — William H. Moose, University of Illinois S. Application of Loading Prediction to Ship Structure Design: A Comparative Analysis of Methods — D. Liu, H.H. Chen, F. Lee, American Bureau of Shipping (ABS)