کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
307716 | 513395 | 2011 | 10 صفحه PDF | دانلود رایگان |
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.
► We propose an optimization formulation of structures with bounded uncertainties.
► A non-probabilistic reliability index is defined based on multi-ellipsoid convex model.
► This provides a quantified measure of safety margin.
► The optimal design is stated as a nested optimization problem.
► Concerned performance method enables regularization of reliability constraints.
Journal: Structural Safety - Volume 33, Issue 3, May 2011, Pages 196–205