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JMT 2017, Vol. 25 Issue (4) :250-260    DOI: 10.1007/s40534-017-0142-x
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Longitudinal train dynamics of electric multiple units under rescue
Wei Shan1, Lai Wei2, Kai Chen3*
1 Transport Bureau, China Railway Corporation, Beijing, China;
2 State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, China;
3 CRRC Qingdao Sifang Rolling Stock Research Institute Co., LTD, Qingdao, China

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Abstract Once operating trains are disabled on the railway lines, an efficient manner is to utilize the train for train rescue. Owning to the different train and coupler types, it is difficult to formulate uniform regulations for train to train rescue. In this paper, the longitudinal train dynamics of electric multiple units under rescue were analyzed by field and laboratory tests. The angling behavior of the brakinginduced coupler under compressed in-train forces was analyzed. A dynamic model for the train and draft gear system was developed considering accurate boundary limitations and braking characteristics. The safety indices dynamic evaluations of different train to train rescue scenarios were analyzed. It is indicated that the coupler vertical rotation occurs during the emergency braking applied by the assisting train. The vertical force components of intrain forces lead to the carbody pitch behavior and even cause local destructions to the coupler system. The carbody pitch motion can arise the inference of in-train devices. Based on the safety evaluation of train and coupler system, the regulations for typical train to train rescue scenarios were formulated.
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KeywordsElectric multiple units   Train rescue   Coupler and draft gear   Braking   Coupler angling behavior     
Received 2017-04-22;

This work was supported by the National Natural Science Foundation of China[No. U1334206] and the National Key R&D Program of China[No. 2016YFB1200500].

Corresponding Authors: Lai Wei     Email: 707101305@qq.com
Cite this article:   
Wei Shan, Lai Wei, Kai Chen.Longitudinal train dynamics of electric multiple units under rescue[J]  JMT, 2017,V25(4): 250-260
http://jmt.swjtu.edu.cn/EN/10.1007/s40534-017-0142-x      or     http://jmt.swjtu.edu.cn/EN/Y2017/V25/I4/250
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