Purpose

The purpose of this paper is to study the behavior of a single ridge passing through elastohydrodynamic lubrication of point contacts problem for different ridge shapes and sizes, including flat-top, triangular and cosine wave pattern to get an optimal ridge profile.

Design/methodology/approach

The time-dependent Reynolds’ equation is solved using Newton–Raphson technique. Several shapes of surface feature are simulated and the film thickness and pressure distribution are obtained at every time step by simultaneous solution of the Reynolds’ equation and film thickness equation, including elastic deformation. Film thickness and pressure distribution are chosen to be the criteria in the comparisons.

Findings

The geometrical characteristics of the ridge play an important role in the formation of lubricant film thickness profile and the pressure distribution through the contact zone. To minimize wear, friction and fatigue life, an optimal ridge profile should have smooth shape with small ridge size. Obtained results are compared with other published numerical results and show a good agreement.

Originality/value

The study evaluates the performance of different surface features of a single ridge with different shapes and sizes passing through elastohydrodynamic of point contact problem in relation to film thickness and pressure profile.

中文翻译：

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通过点接触的弹性流体力学改变单个脊的不同形状的几何特性的影响

目的

本文的目的是研究通过不同点形状和大小（包括平顶，三角形和余弦波形）的点接触问题的弹性流体动力润滑的单点接触行为，以获取最佳的峰形轮廓。

设计/方法/方法

时间相关的雷诺方程是使用牛顿-拉夫森技术求解的。通过同时求解雷诺方程和膜厚方程（包括弹性变形），模拟了几种表面特征的形状，并在每个时间步上获得了膜厚和压力分布。选择膜厚和压力分布作为比较的标准。

发现

脊的几何特征在润滑剂膜厚度分布的形成和通过接触区域的压力分布中起重要作用。为了最大程度地减少磨损，摩擦和疲劳寿命，最佳的凸脊轮廓应具有平滑的形状和较小的凸脊尺寸。将获得的结果与其他已发布的数值结果进行比较，并显示出良好的一致性。

创意/价值

该研究评估了通过形状与膜厚和压力分布有关的点接触问题的弹性流体力学，对具有不同形状和大小的单个脊的不同表面特征的性能。