深沟球轴承剥落故障动力学建模与仿真

Dynamic Modeling and Simulation of Spalling Fault of Deep Groove Ball Bearing

在实际工况下,设备的故障信号难以采集且信号特征难以提取,使得机械故障诊断缺少数据。为解决这一问题,采用动力学仿真的方式获取更多具有特征的数据,利用模拟仿真的数据实现小样本数据诊断。基于Hertz接触理论,引入轴承故障的结构几何参数,建立四自由度单点故障的动力学模型,仿真并分析轴承外圈和内圈剥落故障时的系统振动信号并获得相应故障特征。通过对比凯斯西储大学的实验信号,所建模型的正确性得以验证。

In the actual working conditions,it is difficult to collect equipment fault signals and extract signal characteristics,which makes mechanical fault diagnosis lack of fault diagnosis data.In order to solve this problem,in this paper,dynamic simulation is used to obtain more characteristic data,and small sample data diagnosis is realized by using simulation data.Based on Hertz contact theory,this paper introduced the structure of the bearing fault geometry parameters to establish four degrees of freedom dynamic model of a single point of failure,the simulation and analysis of the bearing outer ring and inner ring spalling failure of the system and get the corresponding fault vibration signal characteristics.Through the contrast of Case Western Reserve University experiment signal,the correctness of the model is verified.