两端截尾分布理论及其在应力-强度干涉模型中的应用

Two End Cutting-Off-Tail Distribu tion Theory and Its Application to Stress Strength Interference Model

在理论分布的基础上 ,提出两端截尾分布理论 ,并讨论了在不同条件下不同设计变量截尾点的确定方法。在进行机械零件、构件的可靠性计算时 ,目前都是利用应力-强度干涉模型 ,从符合工程实际出发 ,本文建立了两端截尾分布的应力 -强度干涉模型 ,并推导建立了应力、强度服从不同截尾分布时机械零件、构件的可靠度计算公式 ,为工程应用提供了方便实用的条件。

On the basis of theoretical distributions, the theory of cutting off tail distribution at two ends was proposed. Also, methods to find out cutting off points of various design parameters and under various conditions were discussed. Recently, stress strength interference model is widely used in reliability design of mechanical components. To fit for practical use, stress strength interference model of cutting off tail distribution was set up in this paper. Calculating formulae of reliability in combining cutting off tail stress and strength under various distributions has been given, which is very convenient for practical use.