Abstract:

To address the challenges of severe wheel-rail wear in high-speed trains and the substantial discrepancies among existing wear coefficients for evaluating wear characteristics， this paper proposes a method for determining the wheel-rail wear coefficient that accounts for wheel tread slope. Based on Archard's wear model and incorporating wheel-rail material properties， the proposed method is developed through bench tests and numerical simulations. Experimental measurements and simulation verification demonstrate that， under identical conditions of load， friction coefficient， and relative sliding velocity， the consideration of tread slope leads to higher contact stress and maximum wear rate， smaller contact patch area and wear coefficient， and a nonlinearly increasing reduction rate of the contact patch area.

Key words: tread slope, wear coefficient, wear test, high-speed train

摘要：

针对高速列车轮轨磨损大、现有轮轨车辆磨损系数在评估轮轨磨损特性时存在显著偏差的问题，基于台架试验与仿真，在Archard磨损模型基础上结合轮轨材料特性，提出考虑车轮踏面斜率的轮轨磨损系数研究方法。试验测定与仿真验证的结果表明，在载荷、摩擦因数、相对滑移速度相同条件下，考虑车轮踏面斜率时轮轨的接触应力与最大磨损速率均较大，接触斑面积与磨损系数均较小，且接触斑面积缩减率非线性增大。

关键词: 踏面斜率, 磨损系数, 磨损试验, 高速列车