Objective To optimize the passive safety protection performance of high-speed trains, it is necessary to design a carbody front-end energy-absorption device suitable for high-speed trains, so as to reduce the carbody deformation during collisions and thereby protect passenger safety.

Method A combined approach of three-dimensional modeling and simulation analysis is adopted. Based on train collision scenarios, a full-scale three-dimensional model of the front-end energy-absorption device is established using simulation software. By embedding the energy-absorption core components within the front end of the coupler and installing the energy-absorption device at the coupler connection, mechanical simulations are carried out. The simulation process strictly follows the specified collision condition parameters, concentrating on the buffering force characteristics of the energy-absorption structure. Through data collection and analysis, the force-displacement curves are generated, accurately capturing the force transmission law and deformation characteristics of the energy-absorption device throughout the entire collision process.

Result & Conclusion  The simulation results show that the designed carbody front-end energy-absorption device can effectively absorb collision energy. The total energy-absorption stroke reaches 601 mm, and the dynamic average buffering force is approximately 2 900 kN, within a reasonable range. The device fully meets the passive safety protection standards of the carbody under the specified working conditions, and can significantly mitigate the impact of collision forces on the carbody, thereby reducing the risk of carbody deformation.