多次模糊载荷下结构动态模糊可靠性分析  

Structural Dynamic Reliability under Fuzzy Loads with Some Times and Fuzzy Strength

作　　者：方永锋[1,2] 陈建军[2] 曹鸿钧[2] 

机构地区：[1]毕节学院机械工程学院,毕节551700 [2]西安电子科技大学电子装备结构设计教育部重点实验室西安710071

出　　处：《机械工程学报》2014年第6期192-196,共5页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51175398);毕节学院高层次人才科学研究(G2013007)资助项目

摘　　要：针对实际工程问题中结构承受多次模糊载荷与结构具有模糊强度的问题,对多次模糊载荷的作用与结构模糊强度随时间变化的情况进行分析,利用应力-强度干涉理论,分别建立结构在多次模糊载荷作用下且结构模糊强度随时间不退化和退化两种情况下的结构动态模糊可靠性预测模型,应用水平截集方法将模糊可靠性预测问题转变成概率可靠性预测问题求解。通过算例说明文中模型的合理性与方法的可行性。For the some times fuzzy loads and fuzzy structural strength in the practice engineer,the fuzzy several times dynamic loads and the structural fuzzy strength are analyzed.The prediction models of the structural dynamic fuzzy reliability are established by using the stress-strength interference theory when the several times fuzzy loads changes over time and the structural strength changes without degeneration and with degeneration.The fuzzy reliability is converted to the probability reliability by using the level-cut method to solve.It is shown that the models are feasible and reasonable by an example.

关 键 词：模糊载荷 模糊强度 结构 动态 可靠度 

分 类 号：TH122[机械工程—机械设计及理论]