计算力学学报2018，Vol.35Issue(1)：7-13,7.DOI:10.7511/jslx20161009002
结构可靠性优化的三阶段解耦方法
Three-stage decoupling method of reliability-based design optimization
摘要
Abstract
In order to improve the efficiency of reliability-based design optimization (RBDO),a three-stage decoupling method is proposed in this paper.In the first stage,the deterministic optimization based on the reliability safety factor is used to find an optimal design,and the optimal design is chosen as an initial sample point.In the second stage,sample points are adjusted by using reliability sensitivities and a weight factor,and a data set between the objective function and the failure probability is obtained.In the third stage,the objective function corresponding to the acceptable failure probability is extracted by using a relationship curve between the objective function and the failure probability,and final optimization design variables are obtained.The deterministic optimization is used only one time in the proposed method,and all classical algorithms of structural reliability can be used for the proposed method.The adaptability of the proposed method is strong.The numerical results show that the proposed method can obviously reduce the number of evaluation of failure probability,and results are not sensitive to the reliability safety factor and weight factor.关键词
基于可靠性的结构优化/解耦法/安全因子/灵敏度/重量因子Key words
reliability-based design optimization/decoupling/safety factor/sensitivity/weight factor分类
数理科学引用本文复制引用
赵维涛,王建业,祁武超..结构可靠性优化的三阶段解耦方法[J].计算力学学报,2018,35(1):7-13,7.基金项目
国家自然科学基金(11502149) （11502149）
国防基础科研计划基金(JCKY2013601B) （JCKY2013601B）
辽宁省自然科学基金(201602579) （201602579）
辽宁省教育厅项目(L2014072)资助项目. （L2014072）
