|Table of Contents|

Axle box spring load characteristics and fatigue damage of high-speed train(PDF)

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

Issue:
2019年04期
Page:
81-93
Research Field:
载运工具运用工程
Publishing date:

Info

Title:
Axle box spring load characteristics and fatigue damage of high-speed train
Author(s):
YANG Guang-xue1;  ZHANG Ya-yu1;  LI Guang-quan2
(1. School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China; 2. CRRC Qingdao Sifang Co., Ltd., Qingdao 266111, Shandong, China)
Keywords:
vehicle engineering;  axle box spring;  load characteristic;  trend load;  dynamic load;  load spectrum;  fatigue damage
PACS:
U270.12
DOI:
-
Abstract:
Taking the axle box spring of high-speed train as the research object, the spring load test sensor installed on the power bogie was made through the load calibration method. The load-time history of axle box spring was obtained from line test. Combined with a vehicular gyroscope signal, the spring load characteristics of axle box were analyzed under typical working conditions, such as traction, braking, straight line with high or low speed, in and out of ramp, and curve line. According to the change characteristics of axle box spring load, the test load was decomposed into the trend load and dynamic load. On the basis of statistics, the load spectrum of axle box spring under certain mileage was given, the corresponding relationship between load amplitude and its frequency was determined. According to the damage consistency criterion, the damage proportion of load spectrum at all levels and the variation rule of fatigue damage of axle box spring with the increase of train speed were analyzed. Analysis result shows that the axle box spring load is linear with strain, and its transfer coefficient is94.5 kN-1. Compared with the non-power side axle box spring, the load amplitude of power side axle box spring is greatly influenced by the torque load of motor. During train start-up phase, the motor output torque reaches the maximum value. The loads on the power and non-power side axle box springs are -7.42 and 1.26 kN. When the train speed increases from 240 to 350 km·h-1, the axle box spring trend load varies from -0.6 to -2.0 kN, and the maximum dynamic load increases from 1.53 to 1.86 kN, which increases by 22%. The fatigue damage proportions of power side axle box spring are 0.79 and 0.75 when the train is in low and high speeds. The increase of train speed will slightly reduce the fatigue damage proportion caused by the high amplitude load of axle box spring, which is consistent with the distribution characteristics of non-power side fatigue damage proportion. The fatigue damages of both power and non-power side axle box springs tend to decrease first and then increase finally as the train speed increases. The fatigue damage reaches the minimum value when the train speed is around 300 km·h-1, and the fatigue damages of power and non-power side axle box springs are 0.110 and 0.004 respectively. 1 tab, 19 figs, 32 refs.

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Last Update: 2019-09-03