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论文类型：期刊论文

发表时间：2011-05-01

发表刊物：STRUCTURAL SAFETY

收录刊物：SCIE、EI

卷号：33

期号：3

页面范围：196-205

ISSN号：0167-4730

关键字：Structural optimization; Uncertainty; Convex model; Non-probabilistic reliability; Sensitivity analysis

摘要：This paper investigates the formulation and numerical solution of reliability-based optimization of structures exhibiting grouped uncertain-but-bounded variations. Based on the multi-ellipsoid convex model description for grouped uncertain-but-bounded parameters, the mathematical definition of a non-probabilistic reliability index is presented for quantified measure of the safety margin. The optimal design is then formulated as a nested optimization problem. A method based on concerned performance is proposed for regularization of the reliability index constraints. The expensive computation of the non-probabilistic reliability index and its derivative is thus avoided. Numerical examples are given to illustrate the validity and efficiency of the present method. (C) 2011 Elsevier Ltd. All rights reserved.