滚动轴承局部故障数学模型的建立与应用

Establishment and application of mathematical models for rolling element bearings with localized faults

在前人所建立的模型基础上,引入了滚动体的随机滑动和周期性变化的振动传递函数,并综合考虑了静态载荷分布和故障点的位置,建立了滚动轴承局部故障的随机振动数学模型。模型使用MATLAB语言编程实现,并通过给其混入噪声进行故障诊断试验,验证了该模型在轴承故障机理分析和故障诊断方面的实效性。

The stochastic mathematical models of vibration signals produced by localized faults in rolling element bearings were established here.Comparing with the models set up by the other researchers,these models were improved by introducing the random slip of rolling elements and their periodically varying transfer function of vibration,and taking the static load distribution and the positions of the faults into account.The models were performed with MATLAB software.The noise was added in and the fault diagnosis test was carried out.The results validated that the proposed models have practical value in the mechanism analysis of bearing faults and their fault diagnosis.