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Frontiers of Mechanical Engineering

Front Mech Eng Chin    2010, Vol. 5 Issue (4) : 465-469
Mechanism of self-excited torsional vibration of locomotive driving system
Jianxin LIU1(), Huaiyun ZHAO2, Wanming ZHAI1
1. Traction Power State Key Laboratory, Southwest Jiaotong University, Chengdu 610031, China; 2. Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621900, China
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A single wheelset drive model and 2-DOFs torsional vibration model were established to investigate the self-excited torsional vibration of a locomotive driving system. The simulation results indicate that the self-excited torsional vibration occurs when the steady slip velocity is located at the descending slope of the adhesion coefficient curve. The principle of energy conservation was used to analyze the mechanism of the self-excited vibration. The factors affecting on the amplitude of the self-excited vibration are studied.

Keywords locomotive      driving system      self-excited torsional vibration      mechanism      influence factor     
Corresponding Authors: LIU Jianxin,   
Issue Date: 05 December 2010
 Cite this article:   
Jianxin LIU,Huaiyun ZHAO,Wanming ZHAI. Mechanism of self-excited torsional vibration of locomotive driving system[J]. Front Mech Eng Chin, 2010, 5(4): 465-469.
Fig.1  Single wheelset drive model
dry condition0.530.120.532.40
wet condition0.600.200.600.65
Tab.1  Parameters for adhesion coefficient in Eq. (2)
Fig.2  Adhesion coefficient curves
Fig.3  2-DOFs model of torsional vibration system
Fig.4  Phase diagrams of torsional vibrations. (a) ; (b)
Fig.5  Relationship between and when
Fig.6  Relationship between and when
Fig.7  Self-excited torsional vibration amplitudes at different parameters. (a) Steady slip velocity; (b) equivalent damping; (c) equivalent stiffness; (d) ratio of moment of inertia
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