线接触弹流问题中可压缩性的影响

The Effects of Compressibility on Solutions of the EHL Lines Contact Problems

采用复合直接迭代法求解Reynolds方程,变形矩阵法求解表面变形,针对线接触弹流问题中压缩性的影响进行计算研究,讨论不同速度、不同负载条件下润滑剂可压缩性对压力和油膜厚度的影响。计算结果表明,可压缩性虽然对膜厚的影响相对小一些,但是对二次压力峰的位置与大小的影响很大;速度较高时,可压缩性是必须考虑的要素;考虑润滑剂可压缩性的影响,可以提高弹流润滑问题求解的稳定性。

The effects of compressibility of the EHL lines contact problems were studied by numerical computation,the Reynolds equation was solved with compound iteration method and the surface elastic deformation was solved with deformation matrix method.The effects of different speed,load on pressure distributions and film thickness were discussed.The computation result shows that the compressibility has relatively less influence on film thickness,but brings greatly influence on position and size of secondary pressure peak.The effects of compressibility must be taken into account when speed is relatively high.The stability of EHL problems solution can be improved when considering the effect of compressibility.