Modeling and Dynamic Analysis of Double-Row Angular Contact Ball Bearing-Rotor-Disk System

This article presents a general numerical method to establish a mathematical model of a bearing-rotor-disk system. This mathematical model consists of two double-row angular contact ball bearings (DRACBBs), a rotor and a rigid disk. The mathematical model of the DRACBB is built on the basis of elastic Hertz contact by adopting the Newton Raphson iteration method, and three different structure forms are taken into account. The rotor is modeled by employing a finite element method in conjunction with Timoshenko beam theory, and the rigid disk is modeled by applying the lumped parameter method. The mathematical model of the bearing-rotor-disk system is constructed by the coupling of the bearing, rotor and disk, and the dynamic response of the bearing-rotor-disk system can be solved by employing the Newmark-beta method. The validation of the above mathematical model is demonstrated by comparing the proposed results with the results from the existing literature and finite element software. The dynamic characteristics of the DRACBBs and the dynamic response of the bearing-rotor-disk system are investigated by parametric study. A dynamic characteristic analysis of the DRACBB is conducted to ensure the optimal structure form of the DRACBB under complex external loads, and it can provide a reference for the selection of the structural forms of DRACBBs.