Based on the elastohydrodynamic theory, the nonlinear dynamic behavior of worn oil-lubricated rolling bearings is explored, and the dynamic response including the effect of trajectory of the axis center, the accelerated speed, and the film thickness is analyzed. The worn model is represented by the worn depth. The discrete iterative method and implicit Euler method are combined to solve the dynamic equations. In numerical examples, the trajectory of the axis center, the accelerated speed and the film thickness under different worn depths are discussed. It is found that the stabilized point shows significant variation with the worn depth, and the wear effect is also quite related with the rolling speed. The trajectory of the axis center of worn bearing subjected to a step load is also examined in detail.

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磨损油润滑滚动轴承的非线性动力学分析

基于弹性流体力学理论，探索了磨损油润滑滚动轴承的非线性动力学行为，分析了轴心轨迹、加速度、油膜厚度等动态响应的影响。磨损模型由磨损深度表示。离散迭代法和隐式欧拉法相结合，求解动力学方程。数值算例讨论了不同磨损深度下轴心轨迹、加速度和油膜厚度。发现稳定点随磨损深度变化显着，磨损效果也与轧制速度有较大关系。磨损轴承的轴心轨迹受到阶跃载荷的影响也被详细检查。