• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2025, Vol. 61 ›› Issue (23): 96-107.doi: 10.3901/JME.2025.23.096

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Three-dimensional Dynamic Modeling and Vibration Analysis of Deep Groove Ball Bearings under Multi-source Internal Fault Excitation

HU Jimin1, LUO Yang2, YU Yihao1,3, SHI Juanjuan1, HUANG Weiguo1, SHEN Changqing1, ZHU Zhongkui1   

  1. 1. School of Rail Transportation, Soochow University, Suzhou 215131;
    2. College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing 400030;
    3. Bosch Automotive Products (Suzhou) Co. Ltd., Suzhou 215021
  • Received:2024-05-20 Revised:2025-02-03 Published:2026-01-22

Abstract: Dynamic analytical modeling is an important means to study the dynamic characteristics of deep groove ball bearings under internal fault excitation. However, the traditional two-dimensional deep groove ball bearing model is unable to analyze the complex dynamics of bearing elements especially at high speeds, such as three-dimensional rotation, centrifugal and gyroscopic effects, lubrication traction, contact surface slippage, and cage collision. For this reason, based on the Hertz contact theory, a three-dimensional deep groove ball bearing dynamic analytical model considering independent degrees of freedom of multiple rigid bodies, rotational attitude, dynamic circular motion of balls and mixed elastic lubrication was established of the ball bearings with single faults of internal and external races, balls or dynamic unbalanced loads as the object of research. The contact stiffness variation coefficients were introduced, which explained the feasibility of adopting the constant Hertz contact stiffness instead of the time-varying contact stiffness in localized fault areas. The feasibility of using constant Hertzian contact stiffness instead of time-varying contact stiffness in localized fault areas is explained. Finally, the validity of the model is verified through the simulation of the vibration characteristics of the faulty bearing and the comparative analysis of the experimental results.

Key words: bearing failure mechanism, vibration response analysis, fault diagnosis, rotational attitude, Hertzian contact stiffness

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