随机参数弹性连杆机构运动功能的可靠性分析  

Reliability Analysis of Motion Function for Elastic Linkage Mechanism With Random Parameters

作　　者：陈建军[1] 郜文文[1] 赵丽琴[1] 石光军[1] 彭丽霞[1] 

机构地区：[1]西安电子科技大学机电工程学院,西安710071

出　　处：《机械设计与研究》2006年第3期19-22,共4页Machine Design And Research

基　　金：国防预研基金(51421060505DZ0155);陕西省自然科学基金(2002A14)资助项目

摘　　要：在同时考虑机构物理参数和几何参数随机性的情况下,利用矩法求得机构刚性位移的均值和方差;应用弹性动力学KED分析法与威尔逊—θ法相结合的方法进行了弹性位移响应的计算分析,结合Monte—Carlo数字模拟获得机构弹性位移响应在整个周期内的均值和方差;采用代数综合法求得机构输出总位移的均值和方差,建立了机构运动功能可靠性的分析模型。通过算例,分析了机构的弹性变形和各随机参数对机构运动功能可靠性的影响。Considering the randomness of the component physical parameters and geometric parameter, both the expectation and the variance of the rigidity displacement responses are obtained. A method of KED combined with Wilson-θ is applied to analyze the elastic displacement responses and obtain the expectation and variance of the elastic displacement responses using Monte-Carlo digital simulation, The algebra synthesis method is used to obtain the expectation and variance of the assemble responses. The reliability model of mechanism motion function can be built. Through an example, the influence of the elastic deformation and each random parameter on the mechanism reliability of motion function is analyzed.

关 键 词：随机参数 弹性动力学 运动功能 可靠性分析 

分 类 号：TH112.5[机械工程—机械设计及理论] TH114.3