论文部分内容阅读
通过大量试验分析了两级载荷作用下疲劳寿命分布参数的变化规律，研究了非恒幅循环载荷下的疲劳强度可靠性问题的特点及计算方法，通过对疲劳过程中剩余寿命分布规律的分析和研究，针对程序载荷作用下疲劳过程的物理本质，提出了一个以载荷循环数一疲劳寿命干涉模型为基础，以“损伤等效原则”计算不同载荷水平之间的当量循环次数，并充分考虑不同载荷历史下剩余寿命分布参数的变化的疲劳可靠性计算方法。
Through a large number of tests, the variation regularity of the fatigue life distribution parameters under two-stage load is analyzed. The characteristics and calculation methods of the fatigue strength reliability under the unsteady cyclic loading are studied. By analyzing the distribution law of residual life in the fatigue process, Aiming at the physical nature of the fatigue process under the program load, this paper proposes a method to calculate equivalent cycles between different load levels using the “Damage Equivalence Principle” based on the load cycle number and fatigue life interference model, and take full account of the differences Calculation Method of Fatigue Reliability Based on Variation of Residual Life Distribution Parameter Under Load History.