After a certain period of operation of a high-speed train, the bolts of the axle box cover of the train get loosened. To analyze the problem, the wheel wear status and the key components of the bogie vibration are monitored focusing on the relationship between the abnormal vibration of axle box and non-circular wear of the wheels. Meanwhile, the modes of the axle box cover and the primary damper are measured, the modes of the wheelset and the bogie frame are calculated by using finite element method, the deformation shapes of the axle box cover are analyzed in the frequencies which axle box vibrate evidently. The causes of the loosening of these bolts are discussed. The results of the tests show that vibrations in the axle box are concentrated in the 314-372 Hz range and the 514-600 Hz range, which respectively correspond to the 11th to 13th polygonal wear of the wheel and to the 18th to 21th polygonal wear of the wheel. The 314-372 Hz range is close to the natural frequency of the primary damper, which falls in the 221-436 Hz range. The 514-600 Hz range is also close to the natural frequency of the bogie frame and wheelset. These two cases are the main causes of the abnormal vibration of the axle box cover of a high-speed train, which in turn leads to bolts loosening.
LIU Jia
,
HAN Jian
,
XIAO Xinbiao
,
LIU Xiaolong
,
JIN Xuesong
,
WANG Peng
. Influence of Wheel Non-circular Wear on Axle Box Cover Abnormal Vibration in High-speed Train[J]. Journal of Mechanical Engineering, 2017
, 53(20)
: 98
-105
.
DOI: 10.3901/JME.2017.20.098
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