Analysis of Brake Pad Vibration Characteristics in High-speed Trains Induced by Track Irregularities

doi:10.3901/JME.260750

Abstract

Abstract: The connection structure of floating brake pads is a critical yet vulnerable component in train braking systems. Complex track conditions result in intricate and poorly understood vibration characteristics of these pads. To investigate how track irregularities impact the vibration of floating brake pads in high-speed trains, a rigid-flexible coupling vehicle dynamics model is developed and validated with on-site track test data. A finite element model of the braking system is also created, accounting for interactions among various connection structures of the brake pads. This model is confirmed through bench tests and modal coupling theory to ensure precise structural and material parameters. By integrating the vehicle dynamics model with the finite element model, an analysis method is proposed to study the vibration behavior of floating brake pads in relation to track irregularities. The findings indicate that track irregularities increase the vibration fluctuations of the brake pad friction blocks, with the effect more pronounced at higher speeds. To ensure the safety of train disc brakes, it is essential to consider track irregularities in the analysis, design, and evaluation of brake pads.

Key words: track irregularity, high-speed train, brake, vehicle dynamics, vibration characteristics

CLC Number:

TH117
U271

LI Peixuan, WANG Zhiwei, JIANG Shu, ZHAO Chunguang, MO Jiliang, WANG Kaiyun. Analysis of Brake Pad Vibration Characteristics in High-speed Trains Induced by Track Irregularities[J]. Journal of Mechanical Engineering, 2026, 62(14): 291-301.

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URL: http://www.cjmenet.com.cn/EN/10.3901/JME.260750

http://www.cjmenet.com.cn/EN/Y2026/V62/I14/291

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