中文摘要：

建立有效的、符合实际情况的滚动轴承故障动力学模型是滚动轴承故障机理研究的关键。在已获得滚动轴承接触等效刚度与等效阻尼的基础上,考虑滚动轴承游隙以及承载区变化,建立了滚动轴承弹簧阻尼振动模型,将表面损伤故障点的冲击函数分别加载到外圈、内圈和滚动体上,建立了单故障的滚动轴承振动模型,采用四阶龙格库塔计算方法对模型求解,获得了故障滚动轴承内圈的振动数据并进行了频谱分析,采用故障滚动轴承的多体动力学仿真和实测实验对模型进行了验证,模型结果与仿真结果、实测结果的偏差在0.5 Hz以内。

英文摘要：

The key of rolling bearing fault mechanism research is that the built dynamics model of rolling bearing fault is effective and conformed to the actual working condition. On the basis of the gained contact equivalent stiffness and contact equivalent damping of the rolling bearing,the clearance and change of load area are took into account,the spring- damping system vibration model of rolling bearing is established. The vibration model of rolling bearing with single fault is built by loading the impulse function generated by surface damage point into the outer ring,inner ring and rolling body respectively. The vibration models are solved with fourth- order Runge- Kutta method,and then the vibration data of inner ring are obtained and analyzed in frequency spectrum. The correctness of vibration model of fault rolling bearing is confirmed by the multi- body dynamics simulation of fault rolling bearing and practical test experiments. The deviation between the modeling results and simulation results and testing results are less than 0. 5 Hz.