工程设计学报Issue(2)：119-123,128,6.DOI:10.3785/j.issn.1006-754X.2014.02.004
考虑载荷作用次数的机械零部件可靠性灵敏度分析方法
An analytical methodology of reliability and sensitivity analysis for mechanical components considering the times of load action
摘要
Abstract
In order to study the law of mechanical component's reliability and sensitivity under the condition of load actting many times and reduce manufacturing costs by modifying component de-sign parameters according to the sensitivity ,a reliability model was built by combining the proba-bilistic perturbation method ,the moment method and considering the times of load acting .The reliability sensitivity of mechanical component with arbitrary distribution parameters on the con-dition of known first four moments of basic random variables was studied ,applying the probabi-listic perturbation method and the Edgeworth series technique ,combining the order statistic theo-ry to study the influence of load action time on the reliability and sensitivity calculation .Calcula-tion results of the reliability by this model were different from the traditional models .Consider-ing the times of load action ,the reliability values were different under different times of load ac-tion .A bolt was taken as an example to get the reliability variation with the increase in the times of loads .T he reliability and reliability sensitivities of the mean and variance of the random varia-bles were studied .The curves of reliabilities and sensitivities were obtained .Law with the role of the times of load action was that the reliability decreased as the times increased with a monotonic trend ,the reliability value was minimum when the times of load action was maximum . The curves of reliabilities of variables mean and variance had different trend .Among w hich the big-gest influence factor effect on the reliability with time was the diameter mean and variance of bolt .With the time increase ,the bolt cross-section diameter became the dominating factor affect the reliability of the bolt .关键词
可靠度/随机摄动法/矩方法/载荷作用次数/可靠性灵敏度Key words
reliability/probabilistic perturbation method/moment method/times of load action/reliability sensitivity分类
机械制造引用本文复制引用
张义民,吕昊..考虑载荷作用次数的机械零部件可靠性灵敏度分析方法[J].工程设计学报,2014,(2):119-123,128,6.基金项目
国家自然科学基金资助项目（51105062，51135003）；中央高校基本科研业务费专项资金资助项目（N110603001）；“高档数控机床与基础制造装备”科技重大专项课题（2010ZX04014-014）；长江学者和创新团队发展计划资助项目（IRT0816）． （）
