含模糊变量和区间变量的结构可靠性优化设计方法  

Reliability-based optimization of structures with fuzzy and interval variables

作　　者：乔心州[1,2] 仇原鹰[2] 盛英[2] 

机构地区：[1]西安科技大学机械工程学院,西安710054 [2]西安电子科技大学电子装备结构教育部重点实验室,西安710071

出　　处：《计算力学学报》2010年第3期537-541,共5页Chinese Journal of Computational Mechanics

基　　金：教育部留学回国人员实验室基金(030401)资助项目

摘　　要：提出了基于能度可靠性理论的含模糊变量和区间变量的结构优化设计方法。运用能度可靠性理论建立了含模糊变量和区间变量的结构混合可靠性模型,采用结构的最大失效可能度作为混合模型的可靠性度量,给出最大失效可能度的计算方法,并以混合可靠性模型的最大失效可能度为约束条件建立了混合结构优化设计模型。实例计算表明了本文方法的有效性。A new reliability-based optimization method of structures with fuzzy and interval variables is presented.Based on possibilistic reliability theory,a hybrid reliability model of structures with fuzzy and interval variables is developed.The maximum failure possibility is utilized as the measurement of structural reliability with the variables.The calculation methods for the maximum failure possibility are given.Moreover,by regarding the hybrid model reliability as constraints,the reliability-based optimization model is established.A numerical example illustrates the feasibility and validity of the new method.

关 键 词：结构可靠性优化 混合可靠性模型 失效可能度 能度可靠性 

分 类 号：TB114.1[理学—运筹学与控制论]