Journal of Central South University of Technology

, Volume 15, Issue 6, pp 853–859 | Cite as

Micro-process model of hydraulic shock absorber with abnormal structural noise

  • Hong-yu Shu (舒红宇)Email author
  • Wei-wei Zhang (张伟伟)
  • Yu Feng (冯 彧)


In order to discover the causes of the abnormal noise of shock absorbers, it is necessary to identify the operating characteristics of the shock absorbers. A micro-process model for operation of the hydraulic shock absorber was presented. A novel concept, which describes the process of hydraulic shock absorber by dividing it into smaller steps, was proposed. The dynamic model and the differential equations were established. The results of numerical simulation agree well with data obtained from the vibrostand test, indicating that the collision between the piston and the oil, the alternation of static friction and sliding friction acted between the piston and the cylinder, and the adherence between valve plate and piston result in impact on the piston head near the top dead center and the bottom dead center. Ultimately, the impact excites the high-frequency vibration of the piston structure, which can generate the abnormal noise in the hydraulic shock absorber after its transfer. And the maximum vibration acceleration on the piston head and the abnormal noise increase with the increase of the gap between the oil and piston rod head, the maximum static friction force and the adhering function, respectively.

Key words

shock absorber abnormal noise micro-process clearance impact simulation 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    YU Da-wei, LUO Jin-liang. An analysis on the cause of abnormal sound of automobile shock absorber [J]. Journal of Weapon, 2000, 21(1): 19–26. (in Chinese)Google Scholar
  2. [2]
    RUNLING P, JIN J, RALPH O B. Design of an optimal shock-damping isolator with application to casters [J]. Journal of Sound and Vibration, 2006, 289(2): 278–293.Google Scholar
  3. [3]
    CHAOS C P, SHAW S W. The dynamic response of multiple pairs of subharmonic torsional vibration absorbers [J]. Journal of Sound and Vibration, 2000, 231(2): 411–431.CrossRefGoogle Scholar
  4. [4]
    ZHANG Li-jun, YU Zhuo-ping. Experimental research on the abnormal noise of hydraulic suspension shock absorber [J]. Journal of Vibration and Shock, 2002, 21(1): 13–18. (in Chinese)MathSciNetGoogle Scholar
  5. [5]
    SHEKHAR C, HATWAL H, MALLIK A K. Performance of non-linear isolators and absorbers to shock excitations [J]. Journal of Sound and Vibration, 1999, 227(2): 293–307.CrossRefGoogle Scholar
  6. [6]
    YANG Ping, TAN Yong-hong, YANG Jian-min, SUN Nin. Measurement, simulation on dynamic characteristics of a wire gauze-fluid damping shock absorber [J]. Mechanical Systems and Signal Processing, 2006, 20(3): 745–756.CrossRefGoogle Scholar
  7. [7]
    TANG Hua-ping, PENG Ya-qing. Optimal design method for force in vibration control of multi-body system with quick startup and brake [J]. Journal of Central South University of Technology, 2005, 12(4): 459–463.CrossRefGoogle Scholar
  8. [8]
    LU Zhen-hua, LI Shi-min. Simulation techniques for nonlinear dynamic characteristics of telescopic hydraulic dampers [J]. Journal of Tsinghua University: Science and Technology, 2002, 42(11):30–37. (in Chinese)Google Scholar
  9. [9]
    ZHANG Jun-qing, JIN Da-feng, ZHAO Liu-qi, LI Zhi-guo. A study of non-linear mathematical model of double cylinder vibration damper [J]. Engineering Mechanism, 2002, 33(11): 16–18. (in Chinese)CrossRefGoogle Scholar
  10. [10]
    SCHIEHLEN W, HU B. Spectral simulation and shock absorber identification [J]. International Journal of Non-linear Mechanics, 2003, 38(2): 161–171.CrossRefGoogle Scholar
  11. [11]
    LI Zheng. Reason analysis and simulation investigation of front shock absorber abnormal sound for Chang’an SC6350 [D]. Chongqing: Chongqing University, 2004. (in Chinese)Google Scholar
  12. [12]
    BLUNDELL M V. The influence of rubber bush compliance on vehicle suspension movement [J]. Materials and Design, 1998, 19 (11): 29–37.CrossRefGoogle Scholar
  13. [13]
    BESINGER F H, CEBON D, COLE D J. Damper models for heavy vehicle-ride dynamics [J]. Vehicle System Dynamics, 1995, 24(1):35–64.CrossRefGoogle Scholar
  14. [14]
    MOLLICA R, YOUCEF T K. A non-linear dynamic model of a monotube shock absorber [C]// Proceedings of the American Control Conference. Albuquerque, New Mexcico: IEEE Press, 1997: 704–708.Google Scholar
  15. [15]
    WANG Shao-chun, DENG Zong-quan, HU Ming, GAO Hai-bo. Dynamic model building and simulation for mechanical main body of lunar lander [J]. Journal of Central South University of Technology, 2005, 12(3): 329–334.CrossRefGoogle Scholar
  16. [16]
    HIROFUMI M, MASATO K, HIDEAKI K. Mechanism analysis of shock ratting noise [J]. TOYOTA Technical Review, 1997, 47(1):96–103. (in Japanese)Google Scholar

Copyright information

© Central South University Press and Springer-Verlag GmbH 2008

Authors and Affiliations

  • Hong-yu Shu (舒红宇)
    • 1
    Email author
  • Wei-wei Zhang (张伟伟)
    • 1
  • Yu Feng (冯 彧)
    • 1
  1. 1.College of Mechanical EngineeringChongqing UniversityChongqingChina

Personalised recommendations