Self-Excited Torsional Vibrations of Drive System of Locomotive under Slippage
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摘要: 为研究机车发生打滑时传动系统扭转振动,针对机车单轮对传动系统,考虑轮对以及电机与轮对间的扭转刚度,建立了简化的机车传动系统扭转振动方程.当轮轨间的平均蠕滑率超过临界蠕滑率时,产生了传动系统扭转振动极限环,表明传动系统产生了自激振动.对不同工况下传动系统扭转振动频率的计算结果表明,当自激振动发生时,系统的扭转振动频率与其扭转固有频率一致.因此,检测轮对的扭转振动频率可以判断车轮是否打滑.Abstract: A simplified model for torsional vibrations of a single wheel-set drive system was used to study torsional vibrations of a locomotive under slippage.In the model,torsional stiffness of the shaft of a wheel set and that between the traction motor and the wheel-set were taken into account.The phase trajectories of the torsional vibrations are a set of stable limit cycles,signifying self-excited vibrations when the average wheel-rail creepage is over the critical value.Frequencies of torsional vibrations with different operating modes were calculated.The results show that the vibration frequency is in accordance with the natural frequency of the drive system when self-excited vibrations happen.Therefore,analyzing the vibration frequency of wheel-sets is a measure to identify wheel-rail slippage.
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Key words:
- locomotive /
- drive system /
- self-excited torsional vibration /
- wheel slippage /
- slippage measure
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MULLER S,KOGEL R.Numerical simulation of roll-slip oscillations in locomotive drives[J].Zeitschrift fur Angewandte Mathematik und Mechanic,2001,81 (Suppl):61-64.[2] KOANK B,KEIJI K,TSUNAMITSU N.An experimental investigation of transient traction characteristics in rolling-sliding wheel/rail contacts under dry-wet conditions[J].Wear,2007,263 (1):169-179.[3] 刘学毅,印洪.钢轨波形磨耗的影响因素及减缓措施[J].西南交通大学学报,2002,37(5):10-14.LIU Xueyi,YIN Hong.Rail corrugations:influencing factors and retarding measures[J].Journal of Southwest Jiactong University,2002,37(5):10-14.[4] HIROTSU T.Self-excited vibration during slippage of parallel cardan drives for electric railcars[J].JSME International Journal,1987,30(266):1 304-1 310.[5] MEITX,YUJH,WILSONDA.Wheelset dynamies and wheel slip detection[C] //Proc.of 2006 International Symposium on Speed-up and Service Technology for Railway and Maglev System.Chengdu:Southwest Jiaotong University Press,2006:229-235.[6] 任少云,包继华,张建武,等.牵引车在大负荷拖载工况下传动系自激振动建模与仿真研究[J].振动与冲击,2005,24(6):95-101.REN Shaoyun,BAO Jiahua,ZHANG Jianwu,et al.Modeling and simulation of the self-excited torsional vibration of driveline for SZG 4031 towing tractor under heavy load[J].Journal of Vibration and Shock,2005,24 (6):95-101.[7] POLACK O.Influence of locomotive tractive effort on the forces between wheel and rail[J].Vehicle System Dynamics,2001,35(Suppl):7-22.[8] 金学松,张立民.高速机车单轮对牵引力矩数值分析[J].机械工程学报,1999,35(6):56-60.JIN Xuesong,ZHANG Limin.Numerical analysis of the driving torque applied to a single wheelset of locomotive with high speed[J].Chinese Journal of Mechanical Engineering,1999,35(6):56-60.
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