Measured dynamic load distribution within the in situ axlebox bearing of high-speed trains under polygonal wheel–rail excitation  

作　　者：Yu Hou Xi Wang Jiaqi Wei Menghua Zhao Wei Zhao Huailong Shi Chengyu Sha 

机构地区：[1]Frontiers Science Center for Smart High-Speed Railway System,Beijing Jiaotong University,Beijing 100044,China [2]School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University,Beijing 100044,China [3]CRRC Qingdao Sifang Co.,Ltd.,Qingdao 266111,China [4]State Key Laboratory of Rail Tranist Vehicle System,Southwest Jiaotong University,Chengdu 610031,China

出　　处：《Railway Engineering Science》2024年第4期444-460,共17页铁道工程科学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 12302238);the National Key Research and Development Program of China (Grant Nos. 2021YFB3400701, 2022YFB3402904)。

摘　　要：The dynamic load distribution within in-service axlebox bearings of high-speed trains is crucial for the fatigue reliability assessment and forward design of axlebox bearings. This paper presents an in situ measurement of the dynamic load distribution in the four rows of two axlebox bearings on a bogie wheelset of a high-speed train under polygonal wheel–rail excitation. The measurement employed an improved strain-based method to measure the dynamic radial load distribution of roller bearings. The four rows of two axlebox bearings on a wheelset exhibited different ranges of loaded zones and different means of distributed loads. Besides, the mean value and standard deviation of measured roller–raceway contact loads showed non-monotonic variations with the frequency of wheel–rail excitation. The fatigue life of the four bearing rows under polygonal wheel–rail excitation was quantitatively predicted by compiling the measured roller–raceway contact load spectra of the most loaded position and considering the load spectra as input.

关 键 词：High-speed train Axlebox bearing Dynamic load distribution In situ measurement Polygonal wheel–rail excitation 

分 类 号：U211.5[交通运输工程—道路与铁道工程]