• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2015, Vol. 51 ›› Issue (21): 65-72.doi: 10.3901/JME.2015.21.065

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Analysis of Friction Induced Mode Coupling Instability

ZHANG Lijun1, 2,  WU Jun1, 2,  MENG Dejian1, 2,   

  1. 1. School of Automotive Engineering, Tongji University, Shanghai 201804;
    2. New Clean Energy Automotive Engineering Center, Tongji University, Shanghai 201804
  • Received:2014-11-03 Revised:2015-07-29 Online:2015-11-05 Published:2015-11-05

Abstract:

Mode coupling is one of the important mechanisms of instability of friction vibration system, which will be significantly affected by structure impedance characteristic and the contact characteristic of the system friction pairs. A 2-DOF vibrational dynamic model is established for the phenomenon that the different directional modes of a friction pair lead to instability to deduce mode coupling instability and its dependence on the direction of friction force when friction pair components vary greatly in mechanical impedance properties and to study the sensitivity of the unstable areas to the friction pair structure and friction contact parameters. At the same time, the relationship among the constraint modethe contact mode and the coupling mode of the friction components is analyzed as a guide to match the structure parameters and the friction contact parameters of the vibration system to avoid mode coupling as well as a theoretical basis to identify the source of friction pair mode resulting in the instability of the friction-induced vibration.

Key words:

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