Abstract This study proposes a dynamic model of a lubricated roller contact, focusing on the excitation of surface pit/defect. The fluctuation of contact force caused by periodic surface topography variation is used to determine the dynamic displacements and velocities of contact bodies. These responses, in turn, affect the thickness and flow of lubrication film, impacting contact pressure, and consequently contact force that is required in the dynamic analysis. It is shown, as the pit size grows, the acceleration increment escalates, therefore, can be used as an effective indicator for pitting failure occurrence. Additionally, a comparison of contact pressure between dynamic simulation and its quasi-static counterpart points to the importance of dynamic responses in tribological behavior description.

中文翻译：

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关于润滑滚子接触的动力学

摘要 本研究提出了润滑滚子接触的动力学模型，重点关注表面凹坑/缺陷的激发。利用周期性表面形貌变化引起的接触力波动来确定接触体的动态位移和速度。反过来，这些响应会影响润滑膜的厚度和流动，影响接触压力，从而影响动态分析中所需的接触力。结果表明，随着凹坑尺寸的增大，加速度增量逐渐增大，因此可作为点蚀失效发生的有效指标。此外，动态模拟与其准静态对应物之间接触压力的比较表明动态响应在摩擦学行为描述中的重要性。