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通过断裂力学计算、实物车轴疲劳试验及对现有超声波检测精度进行研究，可提高新干线车辆车轴常规检测效率而不失其安全性。作为许可的裂纹，我们提议，车轴的检测重点部位，在齿轮侧车轮轴颈内端的裂纹深度 ＜ ３ｍｍ，而可能在运行中损伤的车轴中间部位裂纹深度＜２ ｍｍ，因为这类裂纹不会扩展。最后，我们发现只要工作应力和残余应力保持现有水平，就有可能在新干线车辆车轴的转向架检测中取消磁粉检测。
Through the fracture mechanics calculation, the physical axle fatigue test and the existing ultrasonic testing precision research, the routine inspection efficiency of the Shinkansen vehicle axle can be improved without losing its safety. As a permitted crack, we propose that the depth of the cracks at the center of the axle end of the gear side should be less than 3 mm and that the depth of the crack at the center of the axle, which may be damaged during operation, be less than 2 mm because such cracks do not propagate . Finally, we found that as long as the working stress and residual stress remain at their current level, it is possible to cancel the magnetic particle inspection in the bogie inspection of Shinkansen vehicle axles.