中文摘要：

为了获得火车轮钢材的疲劳设计数据,对K型和B型火车轮钢材分别进行了疲劳性能试验,用升降法试验测定了2种钢材的疲劳极限,使用成组法试验对2种车轮钢材在三级应力水平下测试了其疲劳寿命,运用可靠性原理比较了2种不同材质、不同结构对车轮疲劳性能的影响。结果表明,K型车轮的疲劳寿命分布集中,可靠性高;B型车轮的疲劳寿命分布相对分散。结合升降法所得的疲劳极限值和成组法试验数据,计算了2种车轮钢材的S—N曲线方程;运用概率方法计算了2种车轮钢材的P—S—N方程,为2种车轮制定设计标准和安全寿命评估提供理论依据。

英文摘要：

To obtain fatigue design data of the train steel wheel,the fatigue tests were carried out for the train wheel steel of K type and B type separately,and its fatigue limit was measured using the fluctuation method,the fatigue life of two kinds of wheel steels were tested using the grouping method at the three stress levels.The influence on the fatigue properties of the wheels with two different materials and different structures were compared using reliability principle.The fatigue life distribution of the actual B type is scattered relatively.The fatigue life distribution of the new K type is.Using probability method,S-N curve equation and P-S-N curve equation of the two kinds of steel were calculated,so that the theoretical basis were put up for developing design standards and safety evaluation of the both wheel.