摘要
以结构体系的可靠度指标作为结构优化设计的控制参数.首先利用分支 界约法寻找结构的主要失效模式,同时采用条件概率法求解结构体系可靠度指标并给出了结构体系可靠度的敏度表达式.然后采用最佳矢量法求解结构体系可靠度指标约束下的最小重量优化设计问题.最后给出了平面刚架计算实例,计算结果表明了方法的有效性,该法也可推广用于空间结构.
The structural system reliability is taken as control parameter for structural optimization design. Firstly, the significant failure modes of structures are identified by using the branch-bound method while structural system reliability is evaluated by conditional probability method, from which expression of sensitivity analysis for the structure system reliability is resulted. Secondly, the problem of the minimum weight design is resolved by using the optimum vector algorithm under the constraint of the structure system reliability. Finally, as an example, a plane rigid frame is analysed to show the efficiency of the proposed method which can also be used for space structure.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2004年第3期66-69,共4页
Engineering Journal of Wuhan University
