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Numerical and experimental investigation on snow accumulation on bogies of high-speed trains

Journal of Central South University 2020年第4期27卷 1039-1053页

作者： GAO Guang-jun ZHANG Yan WANG Jia-bin Key Laboratory of Traffic Safety on the Track of Ministry of Education School of Traffic&Transportation EngineeringCentral South UniversityChangsha 410075China Joint International Research Laboratory of Key Technology for Rail Traffic Safety Central South UniversityChangsha 410075China National&Local Joint Engineering Research Center of Safety Technology for Rail Vehicle Central South UniversityChangsha 410075China

This paper reviews the current status of investigation on snow accumulation on the bogies of high-speed trains(HSTs) running in snowy region. First, the background of the snow issue occurring to the HST and the contra-measures for the snow issue proposed in the past decades are provided by reviewing previous studies. Next, the methodology for investigating the snow issue developed by High-Speed Train Research Center of Central South University is introduced, including the numerical simulation research platform and the experimental devices for two-phase flow wind tunnel tests. Then, effective anti-snow flow control schemes for guiding the underbody airflow and their impact on the motion and accretion of snow in the installation region of the bogies are presented. Finally, the remaining investigating challenge for the snow issue of HST and the future research with respect to the challenge are provided from an engineering application viewpoint.

关键词： high-speed train snow issue bogies numerical simulation experiment

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Vibration-based bearing fault diagnosis of high-speed trains:A literature review

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High-Speed Railway 2023年第4期1卷 219-223页

作者： Wanchun Hu Ge Xin Jiayi Wu Guoping An Yilei Li Ke Feng Jerome Antoni School of Trafc and Transportation Beijing Jiaotong UniversityBeijing 100044China Center of Safety Technology National Railway AdministrationBeijing 100166China Bogie Technical Center CRRC Tangshan Co.Ltd.Tangshan 064000China Department of Electronic and Electrical Engineering Brunel University LondonUxbridge UB83PHUnited Kingdom Department of Mechanical Engineering Imperial College LondonLondon SW72AZUnited Kingdom INSA Lyon University of LyonVilleurbanne 69621France

Due to the advantages of comfort and safety,high-speed trains are gradually becoming the mainstream public transport in *** the operating speed and mileage of high-speed trains have achieved rapid growth,it is more and more urgent to ensure their reliability and *** an important component in the bogies of highspeed trains,the health state of the bearing directly affects the operational safety of the *** is therefore necessary to diagnoze the faults of bearings in the bogies of high-speed trains as early as *** this paper,the bearing fault diagnostic methods for high-speed trains have been systematically summarized with their challenges and ***,it brieﬂy introduces the structure of bearings in the bogies as well as the fault characteristic ***,a brief review of the research on vibration-based signal processing methods and machine learning methods has been ***,the challenges and future developments of vibrationbased bearing fault diagnostic methods for high-speed trains have been analyzed.

关键词： High-speed trains Machinery fault diagnosis bogies Bearings

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