中国机械工程2009，Vol.20Issue(20)：2498-2501,4.
以载荷作用次数为寿命度量指标下的零件可靠性建模
Reliability Modeling of Components Based on Life Measured by the Times of Load Application
摘要
Abstract
The reliability modeling method of components was developed when the life was measured by the times of load application. The models for reliability and failure rate of components under random repeated loads without strength degeneration and those with strength degeneration were respectively derived, and the relationship between the reliability and the times of load application, and that between the failure rate and the times of load application were discussed in different cases. The results show that even though strength does not degenerate, both reliability and failure rate of components decrease as the times of load application increases, and the failure rate curve has partial characteristics of bathtub curve with early failure period and random failure period. When strength degenerates with the times of load application, the reliability of components decreases more obviously as the times of load application increases, and the failure rate of components decreases first and then increases as the times of load application increases, with the whole shape of the bathtub curve.关键词
可靠度/失效率/随机载荷/可靠性模型/载荷作用次数Key words
reliability/ failure rate/ random load/ reliability model/ times of load application分类
通用工业技术引用本文复制引用
王正,康锐,谢里阳..以载荷作用次数为寿命度量指标下的零件可靠性建模[J].中国机械工程,2009,20(20):2498-2501,4.基金项目
中国博士后科学基金资助项目(20080440294) （20080440294）
国家自然科学基金资助项目(50775030) （50775030）
