中文摘要：

在极低速纯滑动条件下完成高粘度聚丁烯弹流油膜的光干涉测量试验，观察到明显的油膜入口凹陷现象。试验结果表明，入口凹陷的深度随载荷的增加而增加，随卷吸速度的增加存在一个极大值。试验中润滑剂的粘度越高，入口凹陷越容易出现。纯滑动条件下，油膜厚度对速度和载荷的依赖关系明显偏离了经典的弹流理论。试验中观察到的入口凹陷证明了已有入口凹陷弹流数值分析的正确性。

英文摘要：

lnterferometric experiments are carded out to study the profile of an elastohydrodynamic lubricating film, which is generated by polybutene lubricants of high viscosities under pure sliding at ultra-slow speeds, and an obvious inlet dimple is observed. The experimental results demonstrate that the depth of the dimple increases with increasing loads, and increases with enlrainment speeds until a maximum is reached. Moreover, in the experiments it is easier to generate the inlet dimple when lubricants of higher viscosity are used. Under conditions of pure sliding, the dependence of film thickness on loads and speeds deviates largely from the classical theory. The present experiments provides a validation of previous numerical elastohydrodynamic lubrication analysis with inlet dimples.