随机载荷下疲劳寿命的估算

复杂随机载荷下疲劳寿命的评估，一直是工程上所关心的问题之一。在设计阶段，通常难以确定详细的应力历程，因而也无从进行循环计数和累计损伤。本文基于传统的疲劳设计思想和概率分析方法，综合考虑平均应力的影响和疲劳寿命固有的分散性，研究了宽带随机载荷作用下疲劳寿命的估算问题

Fatigue Life Prediction Under Random Loads

Fatigue life prediction subject to random loads has always been one of the interesting questions in engineering. The stress history is almost unknown in enough detail to perform the cycle counting and damage accumulation, especially at the design stage. Based on the classicaal fatigue design philosophy and the probabilistic analysis technique, we now give a fatigue life prediction method under random loads accounting for the effects of the mean stresses and the scatter factor of fatigue life. The results of this paper may be useful for structural reliability model of total fatigue life.