中文摘要：

对一四缸内燃机曲轴轴承进行了计入曲轴受载变形和表面形貌的弹性流体动力润滑分析。计算中采用动力学法进行曲轴轴承的润滑分析，采用变形矩阵法计算油膜压力作用下轴瓦表面的变形。结果表明，表面形貌对曲轴轴承轴心轨迹影响较大，表面弹性变形对曲轴轴承轴心轨迹影响很小：计入表面形貌，曲轴轴承最大油膜压力增大显著，最小油膜厚度明显减小，端泄流量在大部分时间几乎没有变化：计入表面弹性变形，轴承最大油膜压力基本都有不同程度的减小；表面弹性变形对端泄流量、轴颈摩擦因数以及最小油膜厚度的影响甚小。

英文摘要：

The elastohydrodynamic lubrication properties of crankshaft bearings considering crankshaft deformation under load and surface roughness for a four-cylinder internal combustion engine are studied. The lubrication of crankshaft bearing is analyzed by kinetics method. The deformation of bush surface under pressure of oil film is calculated by deformation matrix method. The results show that surface roughness has great effect on crankshaft bearing orbit, the surface deformation of bearing affects crankshaft bearing orbit little. When surface roughness of bearing is considered, the highest film pressure of crankshaft bearing increases obviously, the least film thickness decreases remarkably, and the end flow-rate changes little in most time. When elastic deformation of bearing surface is considered, the highest film pressure of bearing decreases to different extent; the influence of elastic deformation of bearing surface on the end flow-rate, journal frictional coefficient and the least film thickness is very small.