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Article

Impact of Train Formation on the Dynamic Responses and Operational Safety of High-Speed Trains under Non-Uniform Seismic Ground Motion

by
Kangming Zhong
1,
Xiaojun Li
1,2,* and
Zhenghua Zhou
3
1
National Key Laboratory of Bridge Safety and Resilience, Beijing University of Technology, Beijing 100124, China
2
Institute of Disaster Prevention, Sanhe 065201, China
3
College of Transportation Engineering, Nanjing Tech University, Nanjing 211816, China
*
Author to whom correspondence should be addressed.
Symmetry 2024, 16(7), 858; https://doi.org/10.3390/sym16070858 (registering DOI)
Submission received: 7 June 2024 / Revised: 3 July 2024 / Accepted: 4 July 2024 / Published: 6 July 2024
(This article belongs to the Section Engineering and Materials)

Abstract

The study of dynamic responses and operational safety of high-speed trains under seismic excitation has increasingly relied on numerical simulation as the most effective and convenient research approach. The majority of studies only focus on single-car formation, and fewer utilize train models with actual standard formation, inevitably resulting in differences in dynamic characteristics of train models and simulation results. Furthermore, trains also have different standard formations in different countries and operating scenarios. Therefore, the influences of train formation on the dynamic responses and operational safety of trains under seismic action are investigated. Hence, a detailed train/vehicle–track coupled dynamics model was established to simulate trains under non-uniform seismic ground motion. Moreover, due to wheel–rail contact simulation being the key factor constraining simulation efficiency, based on the influence pattern of train formation, whether fewer train formations can achieve the same simulation accuracy as the 8-car standard formation is also explored in this paper considering seismic wave propagation effect. Results indicate that variation in train formation can influence the dynamic responses of a coupled system significantly from both the perspective of wheel–rail interaction and vehicle kinematic responses. Moreover, the 5-car formation model can better meet the accuracy requirement and significantly improve computational efficiency compared to 8-car formation model.
Keywords: seismic wave propagation effect; train/vehicle–track coupled dynamics model; train formation; numerical simulation; wheel–rail interaction seismic wave propagation effect; train/vehicle–track coupled dynamics model; train formation; numerical simulation; wheel–rail interaction

Share and Cite

MDPI and ACS Style

Zhong, K.; Li, X.; Zhou, Z. Impact of Train Formation on the Dynamic Responses and Operational Safety of High-Speed Trains under Non-Uniform Seismic Ground Motion. Symmetry 2024, 16, 858. https://doi.org/10.3390/sym16070858

AMA Style

Zhong K, Li X, Zhou Z. Impact of Train Formation on the Dynamic Responses and Operational Safety of High-Speed Trains under Non-Uniform Seismic Ground Motion. Symmetry. 2024; 16(7):858. https://doi.org/10.3390/sym16070858

Chicago/Turabian Style

Zhong, Kangming, Xiaojun Li, and Zhenghua Zhou. 2024. "Impact of Train Formation on the Dynamic Responses and Operational Safety of High-Speed Trains under Non-Uniform Seismic Ground Motion" Symmetry 16, no. 7: 858. https://doi.org/10.3390/sym16070858

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