Dynamic Response of High-speed Train Braking System under Track Irregularity Excitation

doi:10.3901/JME.2025.12.281

Abstract

Abstract: In order to explore the influence of track irregularity excitations on dynamic behaviors of a high-speed train braking system, a dynamics model of a train vehicle contains the disc braking system is established, which systematically considers the effects of brake clamp, brake disc flexible deformation and track irregularity excitations. And the validity of the model is further verified by line tests. Based on the established model, the influence of track irregularity excitations on braking system vibration characteristics and interaction of braking interface is analyzed. The results show that the track irregularity excitations aggravate the wheel-rail interactions and increase the vibration of vehicle system, which leads to the severe vibration of the braking system and causes the more complicated disc-pad interactions. When the vehicle braking at low speeds, the track irregularity excitations have limited influence on dynamic behaviors of the braking system. But a greater braking pressure would enhance the vibration response of the braking system. With the increase of braking speed, the track irregularity excitations significantly affect the dynamic behaviors of the braking system, and the increase of braking pressure reduces the lateral and vertical vibration behaviors of the braking system.

Key words: high-speed train, braking system, track irregularity, dynamic behaviors, flexible deformation

CLC Number:

TH113

YANG Linchuan, CHU Ming, WANG Quan, WANG Zhiwei, MO Jiliang. Dynamic Response of High-speed Train Braking System under Track Irregularity Excitation[J]. Journal of Mechanical Engineering, 2025, 61(12): 281-292.

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