广义随机空间内结构可靠性优化设计  

Reliability Optimum Design For Structural Systems In Generalized Random Space

作　　者：刘金刚[1] 王世鹏 解艳彩 

机构地区：[1]空军航空大学力学教研室基础部,长春130022 [2]大连机床集团,大连116620

出　　处：《机械设计与研究》2010年第5期7-8,12,共3页Machine Design And Research

基　　金："高档数控机床与基础制造装备"科技重大专项资助(2009ZX04001-021)

摘　　要：讨论了广义随机空间内随机参数服从正态分布的可靠性优化设计问题。在基本随机参数均值、方差和相关系数已知的情况下,避免了相关变量的独立变换以及求极限状态函数对基本变量的偏导数,应用可靠度指标计算的优化方法与有限元法相结合,并通过计算机程序给与实现,迅速准确地得到了可靠性优化设计信息。算例结果表明,本文提出的方法是一种有效、实用的方法。Techniques from Hasofer-Lind reliability index calculation method,stochastic finite element method and reliability optimum design method are employed to present the practical and effective method for the reliability optimum design under the condition of known probabiliatic characteristics of basic correlative random variables. In the process of solving reliability index β,Hasofer-Lind reliability index calculation method avoids the orthogonal transformation about correlation variables and the partial derivatives of the limit state function to the original variables in generalized random space. The respective program can be used to obtain the reliability optimum design information accurately and quickly.

关 键 词：广义随机空间 可靠性优化设计 可靠度指标计算的优化方法 随机有限元法 

分 类 号：U463[机械工程—车辆工程] TH122[交通运输工程—载运工具运用工程]