Axle box bearing is a key rotating component in the bogie of high-speed trains. Under com-plex wheel/rail excitations,localized defects caused by fatigue,overload,etc. will threaten the operation safety of railway vehicles. In this paper,a coupled dynamic model of axle box bearing-flexible axle box-vehicle system with different bearing localized defects is established using UM/Simulation co-simulation. The vibration responses of axle box with fault on outer raceway,inner raceway and roller under track ir-regularities and wheel ovalization are studied. In addition,the fault responses from typical points of axle box and rotary arm are compared to select the optimal mounting position of accelerometer on the axle box. The simulated results are helpful to the condition monitoring and fault diagnosis of axle box bear-ings in industrial applications.
关键词
轴箱轴承/局部缺陷/柔性轴箱/动力学模型/测点优化
Key words
axle box bearing/localized defect/flexible axle box/dynamic model/measurement point optimization
维普
万方数据