Lateral load characteristics of EMUs axle box based on measured data

WANG Bin-jie; ZHAO Xin-yuan; FAN Jun; LIU Zhi-ming; LI Qiang; WANG Wen-jing

doi:10.19818/j.cnki.1671-1637.2021.06.017

Volume 21 Issue 6

Dec. 2021

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Article Navigation > Journal of Traffic and Transportation Engineering > 2021 > 21(6): 225-236

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WANG Bin-jie, ZHAO Xin-yuan, FAN Jun, LIU Zhi-ming, LI Qiang, WANG Wen-jing. Lateral load characteristics of EMUs axle box based on measured data[J]. Journal of Traffic and Transportation Engineering, 2021, 21(6): 225-236. doi: 10.19818/j.cnki.1671-1637.2021.06.017

Citation:

WANG Bin-jie, ZHAO Xin-yuan, FAN Jun, LIU Zhi-ming, LI Qiang, WANG Wen-jing. Lateral load characteristics of EMUs axle box based on measured data[J]. Journal of Traffic and Transportation Engineering, 2021, 21(6): 225-236. doi: 10.19818/j.cnki.1671-1637.2021.06.017

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Lateral load characteristics of EMUs axle box based on measured data

doi: 10.19818/j.cnki.1671-1637.2021.06.017

1.
School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
2.
CRRC Changchun Railway Vehicles Co., Ltd., Changchun 130062, Jilin, China

Funds:

National Natural Science Foundation of China 11790281

Project of Scientific and Technological Research and Development of China Railway P2020J024

More Information

Author Bio:
WANG Bin-jie(1979-), male, associate professor, PhD, bjwang2@bjtu.edu.cn
Received Date: 2021-07-02
Available Online: 2022-02-11
Publish Date: 2021-12-01

Abstract

Abstract

A high-precision testing method for axle box lateral loads was investigated. The calibrated axle box was installed on the operating vehicle, and the load-time history was obtained. Combined with the operation state of the vehicle, the load characteristics under typical service conditions of the high-speed line were analyzed. The constant amplitude load spectra corresponding to the conditions of entering and exiting station, low-speed and high-speed operations were compiled. Research results show that the main factors influencing the lateral load of the axle box are vehicle running speed, curve radius, turnouts, and track irregularity. During the service, a low load dominant frequency of 2 Hz exists, and it is relatively fixed and independent of the vehicle running speed. For the frequencies higher than 5 Hz, the load dominant frequency is directly related to the running speed of the train. The variation amplitude of the axle box load on the inner rail side is slightly larger than that on the outer rail side when passing through a curve. The average load and the maximum load amplitude increase with the increasing running speed of the train. As the curve radius increases, the mean value of the lateral load gradually approaches zero, and the maximum load amplitude decreases gradually. Passing through the turnouts during entering and exiting the station will cause a fluctuation of lateral load for approximately 10 s, including the short-time impact load. The lateral track irregularity causes a couple of large fluctuations in the lateral axle box load when passing through the corresponding section. Both the fluctuation period and peak value decreases with the increasing running speed. The entrance to and exit from the tunnel have no significant influence on the lateral load. For the load spectrum results obtained under different operating conditions, the load amplitudes during entering and exiting the station are the largest, and the count of the corresponding cycles is small.The load amplitude during low-speed running is the second largest, and the count of the corresponding cycles accounts for approximately 1/3 of the total. The load amplitude during high-speed running is the smallest, and the corresponding cycle count accounts for more than 60%. 2 tabs, 26 figs, 26 refs.
- vehicle engineering,
- EMUs,
- rotary arm axle box,
- service condition,
- load characteristic,
- load spectrum

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References

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Lateral load characteristics of EMUs axle box based on measured data

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