On the Dynamic Response of Rigid Rotor Supported by Rolling-Element Bearing

摘要

A prototype of a system is a numerical model. It is used to generate large amount of data and can be a successful replacement to experiment, which is often difficult to conduct and moreover is expensive. This article deals with the development of two models of rotor supported by deep groove rolling-element bearings to study the dynamic response. The bearing models are 5-DOFs and multi-body dynamics is developed using Matlab-Simulink and the bond graph environment. The systems of equations generated by modeling rolling-element bearing using these two approaches are theoretically simulated. The effects of speed variations in the dynamic response using these two models are investigated. The three regions namely, periodic, quasiperiodic, and chaotic are seen on the 5-DOFs rotor supported by rolling-element bearing model with increasing speed, whereas bearing model based on multi-body dynamics approach gives only chaotic response for each speed. Thus, using these two modeling approaches, a comparative study of the magnitude and characteristics of rotor motion can be done, and can be used to infer the vibratory nature of rotor in rolling-element bearing.