多阶梯轴模型建立及表面切向载荷施加，模拟轴承的受力(The multi step shaft model is established and the surface tangential load is applied to simulate the bearing force)

此文件作出故障诊断时圆域分析方法，效果非常好，可以用来故障识别。(This file makes a fault diagnosis of the circle domain analysis method, the effect is very good, can be used for fault identification.)