单表面故障的滚动轴承系统非线性动力学研究

Research on Nonlinear Dynamics of a Single Surface Defect in Rolling Element Bearing Systems

针对含有表面故障的滚动轴承非线性动力学关系复杂和难以采用解析方法进行描述等问题,通过对滚动轴承运转过程中承压滚子数变化规律的分析,建立分段函数和缺陷冲击函数描述滚动轴承运转过程中不同位置的缺陷是否处于承载区和缺陷产生冲击力的强弱,提出一组单表面故障的滚动轴承非线性动力学方程,用以描述含有单表面故障的滚动轴承运转过程中的动力学关系。将建立的单表面故障滚动轴承非线性动力学方程导入到ADAMS动力学仿真软件中进行仿真,并与BTV-1A振动测试仪实际测量的含有单表面故障的滚动轴承振动信号进行对比,结果表明,建立的含有单表面故障的滚动轴承非线性动力学方程能够完整描述实际运转中单表面故障滚动轴承的动力学特性。

Nonlinear dynamics of a single surface defect in rolling bearing systems is complex and hard to describe by using analytical methods. Based on inducing the number of laden rollers in the operation process of rolling bearings,subsection functions and fault impinging functions are built for describing whether the defect in different parts is in the laden area or not and the impact force produced by the defect is strong or weak in the operation process of rolling bearing systems. Then a series of nonlinear dynamic equations are proposed for describing nonlinear dynamics of a single surface defect in rolling bearing systems. These nonlinear dynamic equations are introduced into ADAMS software for dynamic simulation,the result of the simulation is compared with vibration signals which are measured from real failure rolling bearings by BTV-1A. It shows that these nonlinear dynamic equations can describe the dynamic characteristics of a single surface defect in rolling bearing systems properly.