Riding comfort of trains with rail irregularities considering contact loss of wheel-rail

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (16) : 181-187.

ZHANG Jingwei1,LIU Xuewen1,WANG Yansong1,WANG Yingyi2

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Abstract

Based on a semi-analytical method of train-bridge interactions that considers the separation between vehicles and bridges, this study presents an improved physical model that is modelled with thirteen degrees of freedom to analyze the riding comfort of trains more precisely.In this new method, all of the passengers in one coach of the train were treated as three mass blocks coupled on the coach of the train.In the numerical analysis, dynamic responses of the train and dynamic responses of the passengers under different train speeds were computed in vehicle-structure dynamic analysis program with different random rail irregularities.And then, these two dynamic responses were compared.The results show that the rail irregularities affect the vertical acceleration of the passengers and the train, and differences of dynamic responses between the train and passengers existed, these differences have effect on judgement of the riding comfort of the train moving over a bridge.

Key words

Equivalent people-vehicle model / Wheel-rail contact loss / Riding comfort / Rail irregularities

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ZHANG Jingwei1,LIU Xuewen1,WANG Yansong1,WANG Yingyi2. Riding comfort of trains with rail irregularities considering contact loss of wheel-rail[J]. Journal of Vibration and Shock, 2019, 38(16): 181-187

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