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<p>To accurately reflect the erosion of the armature in sliding electrical contact, a motion-electromagnetic-temperature coupled melt-wave model based on the finite volume method was established, with the non-ideal contact between the armature and rail taken into account; armature ablation was simulated by updating boundary conditions, and the factors influencing armature melting under both steady and transient conditions were analyzed. The results show that armature ablation is affected by the velocity skin effect, starting at the armature tail and continuing to propagate toward the head; under steady conditions, an increase in the friction coefficient accelerates the armature’s melting speed, while a continuous increase in normal force first reduces and then increases the melting speed; under transient conditions, changes in current alter the armature’s Joule heat, which in turn affects armature ablation. The findings of this study provide a reference for further research on the armature transition mechanism.</p>

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Numerical simulation of melt-wave in non-ideal sliding electric contact

  • 期刊论文

  • 发表日期：

    2026年3月20日

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  • Kefeng Yang,
  • Gang Feng,
  • Tianyou Zheng,
  • Shaowei Liu,
  • Xiaoquan Lu,
  • Xiangyu Du

摘要

To accurately reflect the erosion of the armature in sliding electrical contact, a motion-electromagnetic-temperature coupled melt-wave model based on the finite volume method was established, with the non-ideal contact between the armature and rail taken into account; armature ablation was simulated by updating boundary conditions, and the factors influencing armature melting under both steady and transient conditions were analyzed. The results show that armature ablation is affected by the velocity skin effect, starting at the armature tail and continuing to propagate toward the head; under steady conditions, an increase in the friction coefficient accelerates the armature’s melting speed, while a continuous increase in normal force first reduces and then increases the melting speed; under transient conditions, changes in current alter the armature’s Joule heat, which in turn affects armature ablation. The findings of this study provide a reference for further research on the armature transition mechanism.