基于虚拟样机的轴承故障模拟技术研究

Fault simulation of bearing based on virtual prototype

根据Hertz接触理论对球轴承内部进行力学分析,同时根据弹性流体润滑理论考虑了轴承的润滑特性,基于ADMAS建立了内圈故障尺寸为0.007英寸,0.014英寸和0.021英寸时的故障轴承模型,仿真得到了内圈故障的振动数据,将分析得到的故障特征频率与理论计算值以及西储大学实验值进行比较,结果表明:不同故障尺寸仿真得到的特征频率与计算值和实验值均相近,最大相对误差为3.46%。从而验证了采用虚拟样机技术建立轴承典型故障数据库的可行性。

According to the Hertz contact theory, the internal mechanical analysis of the ball bearing was carried out, and the lubrication characteristics of the bearing were considered according to the elastic fluid lubrication theory. Based on ADMAS, the fault bearing models with inner ring fault dimensions of 0.007 inch, 0.014 inch and 0.021 inch were established, and the vibration data of inner ring fault were simulated. The results show that the simulated characteristic frequencies of different fault sizes are close to the calculated and experimental values, and the maximum relative error is 3.46%. It is feasible to use virtual prototype technology to establish bearing typical fault database.