Prediction of Dynamic Properties of a Rotor Supported by Hydrodynamic Bearings Using the Finite Element Method

摘要

General programs for rotor bearing analysis using the finite element method are presented. A consistent representation of both mass and stiffness is used for the rotor shaft while hydrodynamic bearings are calculated by solving a Reynolds equation. Dynamic characteristics of these bearings are then obtained with a perturbation method. These programs are compared with both numerical and experimental results from the literature and agreement is shown to be good. The influence of bearing characteristics on the stability threshold and the unsteady response of a rotor are also studied.