机械可靠性分析的等效威布尔分布法

本文提出了拟纯概率法思想,并建立了等效威布尔分布法。由于威布尔分布可呈现多种分布形态,因而能克服目前在机械可靠性分析中常用的等效正态分布法的局限性,更合理地描述机械可靠性分析中的各类随机量。 

AN EQUIVALENT WEIBULL DISTRIBUTION METHOD FOR MECHANICAL RELIABILITY ANALYSIS

A new reliability analysis method is presented which is called quasi pure probabilistic method(QPPM).On the basis of the present method,equivalent Weibull distribution method(EWM)is established for the reliability analysis of machine elements.Weibull distribution can express different distribution forms,so it is a more suitable method to describe random parameters with different distribution forms in mechanical reliability analysis.The calculation accuracy of the EWM is higher than that of the equivalent normal distribution mehtod(ENM)in reliability prediction.The present method is intelligible in concept,convenient in use,and has more important significance for reliability prediction of mechanical products with higher reliability requirements.