Reliability-Based Design of Externally Pressurized Vessels

[+] Author and Article Information
A. C. Morandi

MSL Engineering Limited, Ascot, Berkshire SL5 9NQ, U.K.

P. K. Das

Department of Naval Architecture and Ocean Engineering, University of Glasgow, Glasgow G12 8QQ, U.K.

D. Faulkner

4 Murdoch Drive, Glasgow G62 6QZ, U.K.

J. Offshore Mech. Arct. Eng 120(3), 149-153 (Aug 01, 1998) (5 pages) doi:10.1115/1.2829535 History: Received September 01, 1997; Revised March 01, 1998; Online December 17, 2007


A reliability-based Level I design procedure is proposed for ring-stiffened cylindrical shells under external pressure. The main collapse modes and the present safety factor approach are reviewed. The major aspects involved in code development, such as the statistical properties of the basic variables, reliability methods, sensitivity studies, code format, target reliability, partial safety factor optimization, and comparison with the present practice are described. Safety margins for design are proposed which depend on the design pressure, maximum expected overdive, and shell slenderness. Some suggestions for future work are also given.

Copyright © 1998 by The American Society of Mechanical Engineers
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