Numerical analysis of hydrodynamic journal bearing under transient dynamic conditions

Abstract

This paper deals with mathematical modeling of steady state behavior of the center of a rigid rotor sup-ported by hydrodynamic journal bearing. The static oil film pressure on the bearing is obtained by the steady state Reynolds equation. The mathematical model of the time-dependent motion of the rigid rotor supported by oil jour-nal bearing has been developed. The nonlinearity of the oil film pressure significantly complicates the task of solving the time-dependent Reynolds equation. Also, the simula-tion results obtained using the proposed method for the pressure distribution, oil film thickness for static and dy-namic conditions have been presented. Some brief conclu-sions drawn are also given.