A New Study on Reliability-Based Design Optimization

[+] Author and Article Information
J. Tu, K. K. Choi, Y. H. Park

Center for Computer-Aided Design and Department of Mechanical Engineering, College of Engineering, The University of Iowa, Iowa City, IA 52242

J. Mech. Des 121(4), 557-564 (Dec 01, 1999) (8 pages) doi:10.1115/1.2829499 History: Received October 01, 1997; Revised September 01, 1999; Online December 11, 2007


This paper presents a general approach for probabilistic constraint evaluation in the reliability-based design optimization (RBDO). Different perspectives of the general approach are consistent in prescribing the probabilistic constraint, where the conventional reliability index approach (RIA) and the proposed performance measure approach (PMA) are identified as two special cases. PMA is shown to be inherently robust and more efficient in evaluating inactive probabilistic constraints, while RIA is more efficient for violated probabilistic constraints. Moreover, RBDO often yields a higher rate of convergence by using PMA, while RIA yields singularity in some cases.

Copyright © 1999 by The American Society of Mechanical Engineers
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