Alternative calculation on transient elasto-hydrodynamic lubrication

Abstract

Purpose The purpose of this study is to propose a new method to solve transient elasto-hydrodynamic lubrication (EHL) problem. Design/methodology/approach First, the steady-state EHL solution is modified so that the elastic deformation theory is combined with oil film stiffness distribution instead of steady-state Reynolds equation. Second, subsequent dynamic EHL procedure develops, recursively using transient distributed oil film stiffness and damping, where each time-marching solution is iteratively searched by ensuring both oil film force growth and elastic deformation update for each load increment. Findings This method increases calculation speed and provides both distributed EHL stiffness and damping for transient regimes. Originality/value This method is of interest for fast applications such as rolling bearings or gears.