2026-10-15T07:32:10Z https://www.scidb.cn/oai

10.57760/sciencedb.39846 2026-06-22T15:45:17Z

2026-06-22 Research and Optimization of Brake Noise for Lightweight Friction Pairs in Subway Vehicles doi:10.57760/sciencedb.39846 en To address the occurrence of brake noise during the parking brake application in subway vehicles equipped with new type of lightweight friction pairs (aluminum-based composite brake discs and synthetic brake pads), field tests and analyses of the brake friction noise were conducted. Furthermore, by establishing a finite element model of the lightweight brake friction pair and conducting complex modal simulation analysis under braking conditions, the study explored the influence of parameters including friction coefficient, elastic modulus, and braking clamping force, and subsequently proposed measures to suppress brake noise. The results indicate that the main frequency of the brake friction noise is high-frequency brake squeal at around 3000 Hz. The friction coefficient and elastic modulus of the friction pair have a significant impact on the negative modal characteristics of the brake noise, while the braking clamping force has a relatively smaller effect. Based on the simulation results and in accordance with engineering application requirements, the original brake pads were replaced with synthetic brake pads that have a moderate elastic modulus and a relatively low friction coefficient. Subsequent parking brake tests confirmed that there was no brake squeal during vehicle braking. Therefore, by adjusting the elastic modulus of the synthetic brake pads and reducing the friction coefficient, the brake squeal during the braking process can be effectively suppressed in lightweight friction pairs.  Aluminum alloy brake disc; Composite brake pads; Metro vehicle; Complex mode; Brake noise Cao Yunli Zang Chuanxiang Wang Zhiwei Mo Jiliang PUBLIC https://creativecommons.org/licenses/by-nc-nd/4.0/ dataset Science Data Bank