一种预测焊接结构疲劳寿命的新方法

A New Method to Predict Fatigue Life of Welded Structures

介绍了一种用于焊接结构疲劳寿命预测的方法。这种方法是基于功率谱密度等有关的统计参量,避开了常规疲劳寿命估算中对随机载荷谱进行循环计数的要求。根据输入及结构响应的频率成分,一般都可以预先估算出有关的统计参量,如功率谱密度函数等。文中给出了具体的计算实例,计算结果与实际情况比较吻合。

Describes a new method to predict the fatigue life of weldedstructures without cyclic counting of stochastic load spectrum, as a conven- tional practice in fatigue life estimation, taken into account. it is developedonly involving such statistical parameters as the density of power spectrumwhich will normally be pre-estimated. An instance of superheavy miningtruck chasis is included showing the calculation result in agreement withactual measurements.