RELIABILITY-BASED STRUCTURAL OPTIMIZATION - A SIMPLIFIED SAFETY INDEX APPROACH

被引:65
作者
REDDY, MV [1 ]
GRANDHI, RV [1 ]
HOPKINS, DA [1 ]
机构
[1] NASA,LEWIS RES CTR,CLEVELAND,OH 44135
关键词
D O I
10.1016/0045-7949(94)90406-5
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
A probabilistic optimal design methodology for complex structures modelled with finite element methods is presented. The main emphasis is on developing probabilistic analysis tools suitable for optimization. An advanced second-moment method is employed to evaluate the failure probability of the performance function. The safety indices are interpolated using the information at the mean and most probable failure point. The minimum weight design with an improved safety index limit is achieved by using the extended interior penalty method of optimization. Numerical examples covering beam and plate structures are presented to illustrate the design approach. The results obtained by using the proposed approach are compared with those obtained by using the existing probabilistic optimization techniques.
引用
收藏
页码:1407 / 1418
页数:12
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