- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | DING Haoxu, GUO Lirong, LI Zongzhi, ZHU Tao, WANG Binlin, YANG Bing, XIAO Shoune. Three-Dimensional Collision Dynamics Model of High-Speed Train Considering Vehicle-End Contact and Coupler Instability[J]. Journal of Southwest Jiaotong University, 2026, 61(1): 243-252. doi: 10.3969/j.issn.0258-2724.20240084
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In order to effectively characterize the mechanical response of vehicle-end contact and coupler instability during high-speed train collisions, a contact force calculation method for the longitudinal impact of a thin-walled structure was established, which considered the impact of vehicle misalignment on contact force and contact moment. Characterization methods for the load characteristics of different coupler-buffer devices after the crushing stroke were then established. Finally, based on these two methods, a three-dimensional (3d) train collision dynamics model was constructed considering the vehicle-end contact and coupler instability. The dynamics model results were compared with those from the finite element model (FEM) under two working conditions. The results show that the proposed method can better reflect the contact force responses of different thin-wall structures at different impact speeds, with a maximum relative error of 9.83% compared to the finite element results. The characterization method can effectively distinguish the post-crushing load characteristics of different types of coupler-buffer devices. The developed 3D collision dynamics model is in good agreement with the finite element calculation results in key indicators such as vehicle speed responses, collision interface force responses, and vertical responses of the carbody.
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