发动机连杆小头轴承摩擦动力学建模分析及试验验证
Engine connecting rod small-end bearing tribo-dynamics modelling analysis and experimental validation
连杆小头轴承是发动机中摩擦工况最恶劣的旋转摩擦副之一。小头轴承变形与润滑、摩擦热的耦合效应显著，导致其摩擦动力学建模及数值求解困难。本文基于多体动力学原理和混合润滑理论，建立了考虑轴承变形与摩擦热影响的连杆小头轴承摩擦动力学耦合模型。开发了结合隐式多步法的数值求解策略来解决较强的非线性。在1:1发动机台架上开展小头轴承磨损试验，将仿真磨损位置与台架试验磨损位置对比验证了数值模型及求解策略的有效性。结果表明考虑弹性变形和热效应后，轴承下表面出现轴向…查看全部>>
The connecting rod small-end bearing is one of the rotating friction parts in the engine with the worst friction condition. The significant coupling effect of bearing deformation, lubrication and frictional heat complicates modelling and numerical solution. Based on the multi-body dynamics and mixed lubrication theory, a coupled tribo-dynamics model of the engine connecting rod small-end bearing is established taking bearing deformation and frictional heat i…查看全部>>
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