以铁路车辆中的货车为研究对象，设计了模拟实验装置，建立了力学模型．对轴承故障进行了模拟，做了动力仿真计算，共和实验结果进行对比，两者有很好的一致性．证明利用振动信息对车辆轴承故障在线诊断是可行的。附图2幅，参考文献5篇。 Taking the truck in railway vehicles as the research object, a simulation experiment device was designed and a mechanical model was established. Bearing fault simulation, dynamic simulation calculation done, the results of the comparison of the republication, the two have a good consistency. It is proved that it is feasible to diagnose vehicle bearing faults on-line using vibration information. Figure 2, reference 5.