Abstract: The variation rules of strength, load and reliability of mechanical components were studied with the change of time, and a model for dynamic reliability of mechanical components was established under the random load acting. According to the model, the design of dynamic reliability sensitivity was discussed as well as the approach to calculate dynamic reliability sensitivity was proposed, meanwhile, combining the theory of reliability-based optimization design with the method of sensitivity analysis, the computation model of dynamic reliability-based robust optimization design was established, then the problem of dynamic reliability-based robust optimization design of mechanical components is solved.

Key words: Dynamic reliability , Reliability sensitivity ,  Multi-objective optimization , Reliability-based robust design ,  Torsion bar

摘要： 研究了机械零部件强度、载荷和可靠度随时间的变化规律,并建立了随机载荷作用下的机械零件动
态可靠性模型,讨论了动态可靠性灵敏度设计问题,提出了动态可靠性灵敏度设计的计算方法;将可靠性优化设计
理论与动态可靠性灵敏度分析方法相结合,建立了动态可靠性稳健优化设计的计算模型,解决了机械零件的动态可
靠性稳健优化设计问题。

关键词: 动态可靠性 , 可靠性灵敏度 ,  , 多目标优化 , 可靠性稳健 , 扭杆