中文摘要：

在凸轮-挺柱热弹流润滑仿真平台上研究了挤压效应对润滑油膜厚度、接触应力、润滑油温度和摩擦因数的影响.通过对比瞬态热弹流（TTEHL）仿真结果和准稳态热弹流（QTEHL）仿真结果发现,挤压效应使得膜厚、接触应力、温度和摩擦因数在相位上滞后于准稳态仿真结果,在凸轮-挺柱的一个工作周期内,挤压效应仅仅在几个工况突变点对上述参数的大小有明显影响,尤其是在卷吸速度为0的两个位置,挤压效应对接触应力、油膜温度和摩擦因数影响最为显著.

英文摘要：

Squeeze effects on the lubrication behaviour of cam-tappet were investigated with a thermal elasto hydrodynamic lubrication（TEHL）simulator numerically.Comparing transient TEHL（TTEHL）simulation results with quasi-steady TEHL（QTEHL）simulation results,it is shown that the changes of film thickness,pressure,temperature and friction coefficient calculated from TTEHL model has a time lag from that of quasi-steady model.During an operating cycle of cam-tappet,only at the points with radical alteration of operating condition does the squeeze have significant effects on the tribological parameters,especially at the zero entrainment velocity points the effects are most remarkable.