冲击载荷作用下的热弹流润滑数值模拟

Numerical Simulation on Thermal Elastohydrodynamic Lubrication Subjected to Transient Load Impulse

建立了冲击载荷作用下线接触Ree-Eyring流体弹流润滑问题的数学模型,综合考虑了时变效应和热效应。采用多重网格技术求解压力,逐列扫描法求解温度,数值模拟了冲击过程接触区的压力和膜厚变化情况,发现了动态凹陷现象。热解与等温解的结果比较说明温度的影响可以忽略。

A numerical model of line contact elastohydrodynamic lubrication for Ree - Erying fluid subjected to transient load impulse was built, both transient and thermal effects were considered. A multilevel solver was used for pressure calculation, where as a colum - by - colum relaxation technique was used for solving temperature. The distribution of pressure and film thickness was analyzed by numerical simulation. Meanwhile, transient dimple was foud in contact zone. Results show that the influence of thermal effect on numerical simulation could be neglected by comparing thermal results and isothermal results.