Squeeze film effect at elastohydrodynamic lubrication of plain journal bearings

Abstract

The aim of the present work is to study the influence of the elastic displacements of bearing surface coatings on the hydrodynamic lubrication of dynamically loaded journal bearing with finite length. The problem is investigated for a Newtonian lubricant under isothermal and isoviscous conditions. The bearing sleeve is covered with a thin elastic coating whose radial distortions are of the same order of magnitude as the film thickness. The elasticity part of the problem is studied in conformity with the Vlassov model of an elastic foundation and comparisons with other models are carried out. The numerical solution is done by finite difference method with successive over-relaxation procedure. The presented results are obtained for prescribed loci of the shaft centre which corresponds of squeeze film effect. Keyword