|Table of Contents|

Lateral load characteristics of EMUs axle box based on measured data(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2021年06期
Page:
225-236
Research Field:
载运工具运用工程
Publishing date:

Info

Title:
Lateral load characteristics of EMUs axle box based on measured data
Author(s):
WANG Bin-jie1;  ZHAO Xin-yuan1;  FAN Jun2;  LIU Zhi-ming1;  LI Qiang1;  WANG Wen-jing1
(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)
Keywords:
vehicle engineering;  EMUs;  rotary arm axle box;  service condition;  load characteristic;  load spectrum
PACS:
U270.1
DOI:
10.19818/j.cnki.1671-1637.2021.06.017
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 exitingstation, 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.

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Last Update: 2021-12-20