The effect of continuously varying wind speed on high-speed train overturning safety

Autor:	Mu Zhong, Dongrun Liu, Zhongang Wang, Yu Tao, Tian Li, Zhaijun Lu
Rok vydání:	2020
Předmět:	020303 mechanical engineering & transports 0203 mechanical engineering Ramp time Meteorology Mechanical Engineering Environmental science 020302 automobile design & engineering High speed train 02 engineering and technology Wind speed
Zdroj:	Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit. 235:774-786
ISSN:	2041-3017 0954-4097
DOI:	10.1177/0954409720965813
Popis:	Changing topography will affect wind speed variations along railway lines in local areas. When the distance from one wind speed abrupt change location to other is narrow, a continuous variation in wind speed will occur. However, few studies have focused on this topic. In this study, a continuous wind speed variation model is developed based on measured wind speed curves, the interval time of continuous wind speed changes, the wind speed amplitude variation, the wind speed change rate and peak wind speed duration on the train dynamics are investigated. The results show that continuous wind speed variations have a significant impact on the overturning safety of trains compared to a single wind speed change. When the interval time between two adjacent wind speed changes is less than 6 s, it is necessary to consider the influence of continuous wind speed variations. In addition, the influence of the wind speed amplitude changes on train overturning safety is much greater than other factors.
Databáze:	OpenAIRE
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