Nonlinear Dynamics Analysis of a Rolling Bearing

Abstract

A numerical analysis of the nonlinear bearing model about two degrees of freedom has been presented in this paper. The contact between a ball and ring by Hertz theory is described. Influence of the number of balls, shaft rotation and clearance on the acceleration were investigated in detail. Three numbers of balls from 11 to 16 were analyzed. The clearance level in the range of 0-71μm has been studied. It has been shown that the acceleration responses are different, depending on the vibration direction and are usually higher when the radial internal clearance and the shaft speed are increased. The higher ball number caused that the accelerations decreased in both directions. Moreover, two dynamic indicators that can be used for comparison bearing dynamics have been proposed. These obtained results are useful for understanding the vibration response mechanism from a practical point of view.

Analysis of the Dynamic Characteristics of a Gear-Rotor-Bearing System with External Excitation

“…Schwarz et al [1] and other research groups [2] to [3] used dynamic simulations and machine learning algorithms to study the impact of highly dynamic cage motion on the performance of rolling bearings. Smagala and Kecik [4] and Kurvinen et al [5] used a two-degree-of-freedom nonlinear bearing model and the Hertz theory to study the effects of the number of balls and the rotational speed of the rotating axle on the dynamic response. Many scholars [6] to [9] have carried out extensive research on bearing failure dynamics and other aspects, and the results provide help for the ontology.…”