RESEARCH OF SQUEEZE FILE DAMPER BEARING FOR ENGINES OF AUTOMOBILES

1.对汽车发动机曲轴轴承中常见的往复载荷作用下挤压油膜阻尼器轴承的油膜反力进行了理论推导。在此基础上，编制了计算机程序，对往复载荷作用下挤压油膜阻尼器轴承的动力响应进行了数值模拟。建立了挤压油膜阻尼器轴承在往复载荷作用下的动态特性试验台，测量了轴承中阻尼器轴颈的动态响应和油膜中产生的动水压力。实验结果与预测值吻合较好。3.对仿真程序进行了修改，考虑了油膜惯性效应。修正后的理论与高往复频率下的测量结果吻合较好，在高往复频率下，惯性效应被认为是显著的。

1.The oil film reaction forces in squeeze film damper bearing was theoretically obtained for reciprocative loading normally found in crankshaft bearings of automobile engines. Based on the theory, a computer program was developed and coded to simulate the dynamic response of squeeze film damper bearing under the reciprocative loading. This simulation program enables to predict the behavior of a damper journal in the damper bearing installed in actual automobile engines.2.A test rig was set up to measure the dynamic characteristics of squeeze film damper bearings under reciprocative loading, that is, the dynamic response of damper journal in the bearing and also the hydrodynamic pressure developed in the oil film. Measurements proved to be in good agreement with predictions.3.The simulation program was modified to take into consideration the inertia effects of the oil film. The modified theory was in beter agreement with measurements at high reciprocative frequency of loading where the inertia effect was considered to be pronounced.