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<p>High-speed trains experience intensified temperature-wear coupling effects on long ramps, provoking friction-induced self-excited vibrations and compromising operation safety. Therefore, this study investigates the coupling characteristics of brake on long ramps and their influence on vibration signals through drag braking tests, finite element modeling, and a numerical simulation method proposed considering temperature and wear. Results demonstrate that temperature-wear coupling effects are markedly enhanced under long ramps, leading to nonlinear escalation of friction block wear. Rising temperatures amplify vibration signal intensity, while wear progression enlarges the contact area, significantly reduces contact stiffness, and diminishes vibration energy storage capacity. Coupling promotes wear-dominated energy dissipation, attenuating vibration intensity through synergistic interfacial dynamics.</p>

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Impact of temperature-wear coupling on vibration response of high-speed train brakes on long ramps

  • 期刊论文

  • 发表日期：

    2026年4月20日

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  • Min Zhang,
  • Tong Lan,
  • Jiliang Mo,
  • Wei Chen,
  • Zhiwei Wang

摘要

High-speed trains experience intensified temperature-wear coupling effects on long ramps, provoking friction-induced self-excited vibrations and compromising operation safety. Therefore, this study investigates the coupling characteristics of brake on long ramps and their influence on vibration signals through drag braking tests, finite element modeling, and a numerical simulation method proposed considering temperature and wear. Results demonstrate that temperature-wear coupling effects are markedly enhanced under long ramps, leading to nonlinear escalation of friction block wear. Rising temperatures amplify vibration signal intensity, while wear progression enlarges the contact area, significantly reduces contact stiffness, and diminishes vibration energy storage capacity. Coupling promotes wear-dominated energy dissipation, attenuating vibration intensity through synergistic interfacial dynamics.