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构件的疲劳荷载是不断变化的,符合实际受荷情况的随机疲劳寿命计算是设计部门十分关心的问题。掌握了钢结构疲劳裂纹扩展规律和随机荷载的分析统计方法,并进行荷载谱中低应力的截止作用及高低应力相互作用的研究以后,就可以计算随机荷载下结构构件的疲劳寿命。作为精确而又通用的方法,当数计算机模拟计算。工程设计常要求提供既简便又有一定精度的简捷算法。为
The fatigue load of components is constantly changing, and the calculation of random fatigue life in accordance with actual load conditions is a matter of great concern to the design department. After mastering the fatigue crack growth law of steel structures and statistical analysis methods of random loads, and studying the cut-off of low stress in load spectrum and the interaction of high and low stress, the fatigue life of structural members under random loads can be calculated. As an accurate and universal method, several computer simulations are performed. Engineering design often requires simple algorithms that are both simple and accurate. for