Dynamic Analysis of Effect of Number of Balls on Rotor-Bearing System

Abstract

This paper presents a numerical model for investigating the structural dynamic response of an unbalanced rotor system supported on deep groove ball bearings. The aim of this work is to develop a numerical model for investigating the effect of the number of balls on the dynamic characteristics of the rotor ball bearing system. The fourth-order Runge-Kutta numerical integration technique has been applied. The results are presented in the form of time displacement responses and frequency spectra. The analysis demonstrates that the model can be used as a tool for predicting the nonlinear dynamic behavior of the rotor ball bearing system under different operating conditions. Moreover, the study may contribute to a further understanding of the nonlinear dynamics of rotor bearing systems.

Investigation of Nonlinear Forced Vibrations of the “Rotor-Movable Foundation” System on Rolling Bearings by the Jacobi Elliptic Functions Method

“…In fact, the rigidity of a rolling bearing depends on many factors, among which one can note the size of the gap and its geometry [21], the type of load and the mode of operation of the system [22][23][24][25], the number of rolling elements in the bearing, the size and type of fit of the rings, etc. [24,[26][27][28]. Often, Hertz's contact theory is used to analyze and describe the restoring forces of a rolling bearing.…”

Dynamic Model to Predict Effect of Race Waviness on Vibrations Associated with Deep-Groove Ball Bearing

“…The results are presented in form of time displacement response, Poincarè map, and frequency spectra. The analysis demonstrates that the surface waviness is an important parameter affecting on the dynamic characteristics of rotor bearing system [4,5]. The model can also be used as a tool for predicting nonlinear dynamic behavior of rotor system under different operating conditions.…”