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Structural and Multidisciplinary Optimization
Published in: Structural and Multidisciplinary Optimization 4/2019

31-10-2018 | Research Paper

Extending SORA method for reliability-based design optimization using probability and convex set mixed models

Authors: Fangyi Li, Jie Liu, Guilin Wen, Jianhua Rong

Published in: Structural and Multidisciplinary Optimization | Issue 4/2019

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Abstract

In many practical applications, probabilistic and bounded uncertainties often arise simultaneously, and these uncertainties can be described by using probability and convex set models. However, the computing cost becomes unacceptable when directly solving the reliability-based design optimization (RBDO) problem with these uncertainties involved. To address this issue, in this study, a sequential sampling strategy by extending classical sequential optimization and reliability assessment (SORA) method for RBDO is developed. The proposed strategy can successively select sample points to update the surrogate model at each step of the optimization process. New samples for reliability constraints are mainly chosen from the local region around the approximate minimum performance target point (MPTP) and worst-case point (WCP). Typical design examples, including one engineering application, are investigated to demonstrate the efficiency and accuracy of the proposed method.
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Metadata
Title
Extending SORA method for reliability-based design optimization using probability and convex set mixed models
Authors
Fangyi Li
Jie Liu
Guilin Wen
Jianhua Rong
Publication date
31-10-2018
Publisher
Springer Berlin Heidelberg
Published in
Structural and Multidisciplinary Optimization / Issue 4/2019
Print ISSN: 1615-147X
Electronic ISSN: 1615-1488
DOI
https://doi.org/10.1007/s00158-018-2120-2

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