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用实尺寸车轴进行断裂力学计算、疲劳试验 ,对目前超声波探伤的精度进行测定 ,以提高新干线车辆车轴常规检测的效率而又不降低其安全性。作为许可的裂纹 ,提议对车轴最重要的部位 ,齿轮侧轮座内端 3mm深的裂纹 ,对可能在运行中损伤的车轴中间无配合部位 2 mm深的裂纹进行检测 ,发现只要运用应力和残余应力保持现有水平 ,就有可能省去新干线车辆车轴的转向架磁粉检测
Fracture mechanics calculation and fatigue test are carried out on the actual size axles, and the accuracy of the current ultrasonic flaw detection is measured to improve the routine inspection efficiency of the axles of the Shinkansen vehicles without reducing their safety. As a permitted crack, a crack of 3 mm deep at the innermost end of the gear side wheel seat, which is the most important part of the axle, is proposed to detect a crack of 2 mm depth at the uncooperative site in the middle of the axle that may be damaged in operation and found that as long as stress and residual Maintaining the current level of stress may eliminate the need for magnetic particle inspection of bogies on Shinkansen vehicle axles