基于灵敏度的可靠性优化解耦方法
收稿日期: 2014-04-23
修回日期: 2014-09-15
网络出版日期: 2015-03-31
基金资助
国家自然科学基金(51105309)
A decoupling method of reliability optimization based on sensitivity
Received date: 2014-04-23
Revised date: 2014-09-15
Online published: 2015-03-31
Supported by
National Natural Science Foundation of China (51105309)
朱海燕 , 袁修开 . 基于灵敏度的可靠性优化解耦方法[J]. 航空学报, 2015 , 36(3) : 881 -888 . DOI: 10.7527/S1000-6893.2014.0258
A decoupling method based on reliability sensitivity is proposed for the reliability-based optimization (RBO) design of aeronautic structure. It utilizes reliability sensitivity to construct the explicit approximation of the failure probability function (FPF) with respect to design variables quickly, thus its advantage is that it only needs one reliability analysis and repeated reliability analyses can be avoided. After the approximation of the FPF is established, the target RBO problem can be transformed into a deterministic one which can be solved by conventional optimization strategies. Meanwhile, a sequential approximate optimization framework is adopted to guarantee the accuracy of the solution. Examples of composite beam and three-box simulated flap structure are given to demonstrate the feasibility and validity of the proposed optimization method.
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