Citation

Xu P, Yang L, Guo W, Yang C, Che Q, Xu T. Machines (Basel) 2022; 10(12): e1231.

Copyright

(Copyright © 2022, MDPI Multidisciplinary Digital Publishing Institute)

DOI

10.3390/machines10121231

PMID

unavailable

Abstract

An auxiliary protection device (rail holding mechanism) was proposed to control the collision attitude of subway vehicles. The dynamics model of head-on collision of subway vehicles was established and verified by the full-scale collision test of the real car; then the force element structure of the rail holding mechanism was equated; finally, the vertical lift and the pitch angle of the three characteristic sections of car body and the wheelsets were used as the evaluation indicators to study the effects of the three design parameters: the gap distance (x1), the linear stage distance (Δ x2) and the stiffness of linear stage (k1). The results show that the linear stage distance has little influence on the collision attitude of the car body, while the x1 and k1 had a greater influence on the collision attitude of the car body. The reasonable reduction of the gap distance x1 and increase the k1 can effectively reduce the vertical lift of the wheelsets and alleviate the nodding phenomenon of the train, and reduce the derailment and jumping phenomenon during the train collision.

Language: en

Keywords

auxiliary protective device (rail holding mechanism); derailment; multi-body dynamics; pitching angle; train collision attitude; vertical lifting displacement