中文摘要：

在同时考虑缺陷宽度、深度以及载荷区等因素的情况下,根据滚动体上单一点蚀缺陷滚过内外圈时,接触副接触变形量的变化所引起的弹性接触力的变化,建立了滚动体产生单一局部故障的滚动轴承的动力学模型。通过仿真,证实了当滚动体具有单一局部缺陷时,滚动轴承振动信号的低频成分为保持架的旋转频率、滚动体的自转频率及其倍频、以及信号调制形成的边频这一结论论;并通过实验进一步证实了所建立模型和仿真结果的有效性。

英文摘要：

In consideration of the influence of the width, depth of the local defect and load zone, a dynamics model of rolling bearings with a roiling element defect was constructed according to the change of the contact fbrce between the rolling element and races caused by the variation of the contact deflection which took place when the defect passed the races. Through the numerical simulation, it was verified that the frequency compo- nents of the vibration signal of the rolling bearings with a rolling element defect in low frequency region are the rotary frequeney of the cage, the rotation frequency of the rolling element and its multiple frequencies and side bands beside them caused by the rotary frequency of the cage, which is often used in fault diagnosis of rolling- element bearings. The experiment further testified the reliability of the simulated results and the rationality of the model.