Journal of Jilin University(Engineering and Technology Edition) ›› 2020, Vol. 50 ›› Issue (5): 1600-1607.doi: 10.13229/j.cnki.jdxbgxb20190559

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Vertical vibration modeling and motion correlation analysis of rail vehicles

Zhao LIU(),Jiang-lin CHENG,Yu-tian ZHU,Li-hui ZHENG   

  1. School of Mechanical Engineering, Tongji University, Shanghai 201804, China
  • Received:2019-06-03 Online:2020-09-01 Published:2020-09-16

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Abstract:

The change of the railway track during rail vehicles travel will affect the vertical random vibration response of the vehicle body. Based on the vertical acceleration of the vehicle, the angular velocity of the vehicle body and the attitude angle, the vertical vibration mechanics model of the rail vehicles is established. The vertical vibration response of the vehicle body during the operation of the rail vehicles is obtained by numerical solution of the differential coefficient differential equations. The rationality of the vertical vibration mechanics model is tested by comparing with the experimental test vibration acceleration signal. The variation of vertical random vibration of vehicle body with train motion parameters is analyzed. The results show that there is a certain degree of correlation between vertical random vibration of vehicle body and vertical acceleration. It lays the foundation for the safe operation of rail trains and further fault diagnosis based on motion and vibration signals.

Key words: vehicle engineering, rail vehicles, vertical vibration, motion parameters, motion correlations

CLC Number: 

  • U270.7

Fig.1

Schematic diagram of global body and conjoined coordinate system"

Fig.2

Selection of vehicle body euler angle"

Fig.3

Schematic diagram of vehicle body structure"

Fig.4

Vehicle body vibration mechanics model"

Fig.5

ADAMS train model"

Fig.6

Track schematic"

Fig.7

Time history of vehicle body running speed"

Fig.8

Vertical acceleration time history of vehicle body"

Fig.9

Journey time history of vehicle body"

Fig.10

Vehicle body simulation vibration acceleration time history"

Fig.11

Vibration acceleration acquisition site"

Fig.12

Vehicle body test vibration acceleration"

Fig.13

Experimental and simulated vibration acceleration signal total power spectral density"

Fig.14

Time history comparison of driving speed and vehicle vibration acceleration and SW(t)"

Fig.15

Time history comparison of vertical acceleration and vehicle vibration acceleration and SW(t)"

Fig.16

Association analysis of vibration power signal total power spectral density and drive vertical acceleration"

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