Abstract

• Vibrations are found almost everywhere in rotating machines. The most common rotating machinery fault is mass unbalance, which is caused by uneven distribution of the mass. In this study, dynamics characteristics of rotor bearing system has been investigated and verified by numerical simulation and experimental measurements. A simple rotor model is considered in the present work. The purposes of this paper are to identify the natural frequencies of rotor bearing system and study the vibration responses due to rotor unbalance. This numerical simulation is done using COMSOL Multiphysics FEM Software Package. The simulation results are verified by rotor bearing test rig for unbalance and residual unbalance conditions.