JZUS - Journal of Zhejiang University SCIENCE

Journal of Zhejiang University SCIENCE A

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Dynamic analysis of a high-speed train operating on a curved track with failed fasteners

Author(s): Li Zhou, Zhi-yun Shen
Affiliation(s): . State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China
Corresponding email(s): zhouli3134@126.com
Key Words: High-speed train, Ballast track, Failed fastener, Wheel/Rail force, Derailment coefficient, Wheelset loading reduction

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Li Zhou, Zhi-yun Shen. Dynamic analysis of a high-speed train operating on a curved track with failed fasteners[J]. Journal of Zhejiang University Science A,in press.Frontiers of Information Technology & Electronic Engineering,in press.https://doi.org/10.1631/jzus.A1200321

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%J Journal of Zhejiang University SCIENCE A
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%D in press
%I Zhejiang University Press & Springer
doi="https://doi.org/10.1631/jzus.A1200321"

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A1 - Li Zhou
A1 - Zhi-yun Shen
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doi="https://doi.org/10.1631/jzus.A1200321"

Abstract
Chinese Summary
Academic Network
Reviewer Comment

Abstract: A high-speed train-track coupling dynamic model is used to investigate the dynamic behavior of a high-speed train operating on a curved track with failed fasteners. The model considers a high-speed train consisting of eight vehicles coupled with a ballasted track. The vehicle is modeled as a multi-body system, and the rail is modeled with a Timoshenko beam resting on the discrete sleepers. The vehicle model considers the effect of the end connections of the neighboring vehicles on the dynamic behavior. The track model takes into account the lateral, vertical, and torsional deformations of the rails and the effect of the discrete sleeper support on the coupling dynamics of the vehicles and the track. The sleepers are assumed to move backward at a constant speed to simulate the vehicle running along the track at the same speed. The train model couples with the track model by using a Hertzian contact model for the wheel/rail normal force calculation, and the nonlinear creep theory by Shen et al. (1984) is used for wheel/rail tangent force calculation. In the analysis, a curved track of 7000-m radius with failed fasteners is selected, and the effects of train operational speed and the number of failed fasteners on the dynamic behaviors of the train and the track are investigated in detail. Furthermore, the wheel/Rail forces and derailment coefficient and the wheelset loading reduction are analyzed when the high-speed train passes over the curved track with the different number of continuously failed fasteners at different operational speeds. Through the detailed numerical analysis, it is found that the high-speed train can operate normally on the curved track of 7000-m radius at the speeds of 200 km/h to 350 km/h.

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References