Journal of Mechanical Science and Technology

, Volume 33, Issue 1, pp 29–40 | Cite as

Characteristics analysis of rotor-rolling bearing coupled system with fit looseness fault and its verification

  • Haifei WangEmail author
  • Xiaoying Guan
  • Guo Chen
  • Junjie Gong
  • Liang Yu
  • Shijie Yuan
  • Zhida Zhu


Outer ring of bearing fit looseness fault is a common fault. Scratch often appears in the inner surface of pedestal. The fit looseness fault mechanism is not clear. For rotor-rolling bearing system with fit looseness fault between rotor-bearing outer ring and pedestal, a rotor coupling dynamic model that the interaction of bearing outer ring and pedestal are considered. This model is different from the universal rubbing model, where the directions of relative motion between rotor and stator are not considered. Numerical integration method is used to obtain the response of the system where the rotor is established by FEM and the bearing outer ring and pedestal are established by lumped mass model. Firstly, modal test results and simulation results were used to verify the correctness of this model. Secondly, the role of tightening torque between bearing outer ring and pedestal is considered, and the response characteristics of bearing and rotor are analyzed when fit looseness fault is considered. Finally, comparing the simulation results with test results, the waveform and spectrum are similar, which verifies the correctness of the fit looseness model. The fit looseness fault characteristics are that the acceleration after noise reduction shows periodic impact, up and down asymmetry, multiple frequencies appear. A method by increasing tightening torque is put forward to control the vibration caused by fit looseness fault.


Dynamic model Autocorrelation Fit looseness fault Looseness characteristics Tightening torques 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    G. Chen, Nonlinear dynamics of unbalance-looseness coupling faults of rotor-ball bearing-stator coupling system, Journal of Mechanical Engineering, 44 (3) (2008) 82–88 (in Chinese).CrossRefGoogle Scholar
  2. [2]
    Y. G. Luo et al., Nonlinear characteristics of two-span rotorbearing system with coupling faults of pedestal looseness and rub-impact, Transactions of the Chinese Society for Agricultural Machinery, 39 (11) (2008) 180–183 (in Chinese).Google Scholar
  3. [3]
    H. Ma et al., Dynamic characteristic analysis of a rotor system with pedestal looseness coupled rub-impact fault, Journal of Mechanical Engineering, 48 (19) (2012) 80–86 (in Chinese).CrossRefGoogle Scholar
  4. [4]
    H. Ma et al., Analysis of dynamic characteristics for a rotor system with pedestal looseness, Shock and Vibration, 18 (1) (2011) 13–27.CrossRefGoogle Scholar
  5. [5]
    A. Muszynska and P. Goldman, Chaotic responses of unbalanced rotor bearing stator systems with looseness or rubs, Chaos, Solitons and Fractals, 5 (9) (1995) 1683–1704.CrossRefGoogle Scholar
  6. [6]
    F. F. Ehrich, A new class of asynchronous rotordynamic response in high-speed rotors, Proc. of the ASME 2007 Design Engineering Technical Conferences & Computers and Information in Engineering Conference, Las Vegas, Nevada, USA (2007).CrossRefGoogle Scholar
  7. [7]
    Y. Liu et al., Looseness-rubbing coupling fault of dual-disk three-supporting rotor-bearing system, Journal of Aerospace Power, 28 (5) (2013) 977–982 (in Chinese).Google Scholar
  8. [8]
    W. Lu and F. Chu, Experimental investigation of pedestal looseness in a rotor-bearing system, Key Engineering Materials (2009) 413–414, 599–605.Google Scholar
  9. [9]
    H. F. Wang and G. Chen, Certain type turbofan engine whole vibration model with support looseness fault and casing response characteristics, Shock and Vibration (2014) 1–23.Google Scholar
  10. [10]
    H. F. Wang, G. Chen and P. P. Song, Asynchronous vibration response characteristics of connectors with looseness fault and its verification, Journal of Vibroengineering, 17 (7) (2015) 3551–3560.Google Scholar
  11. [11]
    H. F. Wang, G. Chen and P. P. Song, Asynchronous vibration response characteristics of aero-engine with support looseness fault, Journal of Computational and Nonlinear Dynamics (2016) 11:031013-1-031013-10.Google Scholar
  12. [12]
    H. F. Wang et al., Modeling for whole missile turbofan engine vibration with support looseness fault and characteristics of casing response, Journal of Aerospace Power, 30 (3) (2015) 627–638 (in Chinese).Google Scholar
  13. [13]
    S. J. Wang et al., Nonlinear vibration of rotor systems caused by assembly process of a bearing outer ring of an aero-engine, Journal of Aerospace Power, 30 (1) (2015) 82–89 (in Chinese).MathSciNetGoogle Scholar
  14. [14]
    G. Chen, A coupling dynamic model for whole aero-engine vibration and its verification, Journal of Aerospace Power, 27 (2) (2012) 242–254 (in Chinese).Google Scholar
  15. [15]
    G. Chen, Vibration modeling and verifications for whole aero-engine, Journal of Sound and Vibration, 349 (4) (2015) 163–176.CrossRefGoogle Scholar

Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Haifei Wang
    • 1
    • 2
    Email author
  • Xiaoying Guan
    • 3
    • 4
  • Guo Chen
    • 4
  • Junjie Gong
    • 1
  • Liang Yu
    • 1
  • Shijie Yuan
    • 1
  • Zhida Zhu
    • 1
  1. 1.College of Mechanical EngineeringYangzhou UniversityYangzhouChina
  2. 2.Department of Mechanical EngineeringUniversity of BristolBristolUK
  3. 3.School of SoftwareGuangdong Food and Drug Vocational CollegeGuangzhouChina
  4. 4.College of Civil AviationNanjing University of Aeronautics and AstronauticsNanjingChina

Personalised recommendations