基于运用载荷应力频度分布评估转向架构架焊缝疲劳寿命的方法

针对转向架构架焊缝边缘部位,运用以往有损伤实例的车辆的运行试验,获得实际作用应力频度分布.同时,采用新假定的S-N曲线及传统的疲劳设计曲线,进行了上述部位的强度及寿命评价,指出这种方法能获得较稳定的寿命评价结果.

Fatigue Life Estimation of Welds on Truck Frames for Rolling Stock Based on Stress Frequency Distribution Caused by Service Loads

In view of the weld edges on truck frames,with reference to the operation test of vehicles with practical damages before,the stress frequency distribution in practical application is obtained.In the mean time,with the use of the newly supposed S-N diagram and the traditional fatigue design curve,the strength and service life evaluation for the parts above are carried out.It is pointed out that the fairly stable service life evaluation result can be obtained with this method.