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Modified Single Loop Single Vector Method for Stability and Efficiency Improvement in Reliability-Based Design Optimization  

Kim, Bong-Jae (서울대학교 조선해양공학과)
Lee, Jae-Ohk (현대중공업 선박해양연구소)
Yang, Young-Soon (서울대학교 조선해양공학과)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.18, no.1, 2005 , pp. 51-59 More about this Journal
Abstract
SLSV (single loop single vector) method is to solve the excessive computational cost problem in RBDO (reliability-based design optimization) by decoupling the nested iteration loops. However, the practical use of SLSV method to RBDO case is limited by the instability or inaccuracy of the method since it often diverges or converges to a wrong solution. Thus, in this paper, a new modified SLSV method is proposed. This method improves its convergence capability effectively by utilizing Inactive Design and Active MPP Design together with modified HMV (hybrid mean value) method. The usefulness of the proposed method is also verified through numerical examples.
Keywords
reliability-based design optimization(RBDO); modified slsv method; modified hmv method; inactive design; active MPP design;
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