分析了污染对滑动轴承性能的影响 ,以及污染物的大小、位置对流体动压力分布与 Mises应力场的影响。较大的污染物刺破润滑油膜 ,而较小的污染物在高压区对流体动压力分布和 Mises应力场的影响显著 ,不可忽略。计算结果很好地解释了发动机轴承过早失效的问题 The influence of pollution on the performance of plain bearings, the size of contaminants, the distribution of hydrodynamic pressure and the Mises stress field are analyzed. Larger contaminants pierce the lubricant film, whereas smaller contaminants have significant effects on the hydrodynamic pressure distribution and Mises stress field in the high pressure zone and can not be ignored. The calculation results well explain the problem of premature failure of the engine bearings