考虑基本变量模糊随机性的弹性连杆机构广义可靠性分析  

GENERAL RELIABILITY ANALYSIS FOR ELASTIC LINKAGE MECHANISMS WITH FUZZY AND RANDOM BASIC VARIABLES

作　　者：孙颉[1] 吕震宙[1] 

机构地区：[1]西北工业大学航空学院,西安710072

出　　处：《机械强度》2005年第6期851-854,共4页Journal of Mechanical Strength

基　　金：航空基金(00B53010);航天基金(N3CH0502);陕西省自然科学基金(N3CS0501)联合资助项目

摘　　要：对弹性连杆机构的基本变量既具有随机性又具有模糊性的情况下,提出模糊随机可靠性分析的广义响应面法,在弹性动力学(Kineto-elasto dynamic,KED)分析的基础上,编制计算弹性连杆机构随时间变化的模糊随机广义失效概率的响应面法分析程序,并对弹性连杆机构的广义可靠性进行具体计算,得到连杆机构的强度、刚度及混合广义失效概率随时间的变化曲线。结果表明,广义响应面法与直接Monte Carlo法计算结果一致,从而为连杆机构的广义可靠性设计及分析提供依据。A general response surface method （GRSM） is presented to calculate the failure probability of elastic linkages with fuzzy and random basic variables. Based on the Kineto-elasto dynamic finite element method, the GRSM is programmed for the strength, stiffness and the system reliability analysis of the elastic linkages. The concrete calculating results are drawn for the failure probability of the elastic linkage along with time. The comparisons of the GRSM and the direct Monte Carlo simulation show that these two methods are in agreement with each other rather well, and the computation cost of the GRSM is significantly decreased.

关 键 词：模糊 随机 机构 弹性连杆 响应面法 广义可靠性 

分 类 号：TB114.3[理学—概率论与数理统计] O213.2[理学—数学]