车轮磨耗是轮轨接触关系的重要影响因素，对车辆的动力学性能、运行安全和乘坐舒适性有直接影响。双坑磨耗作为一种异常车轮磨耗形式，不仅影响车辆的稳定性和舒适性，还增加了车轮的维修成本，成为轨道交通运营中的重要问题。研究基于实测的地铁车轮踏面硬度数据，建立考虑车轮局部硬度变化的刚柔耦合车辆动力学模型和Archard车轮磨耗模型，分析相同里程不同硬度条件下车轮的磨损过程以及相应的动力学性能，研究车轮踏面名义滚动圆处硬度变化对双坑磨耗的影响。结果表明：随着运行里程不断累积，车轮踏面的双坑磨耗深度呈现出渐次增大的趋势。在同一运行里程下，名义滚动圆处硬度提高，导致在车轮与轨道的接触过程中，产生更大的局部压力，从而加剧了滚动圆两侧区域的磨损。相较于轮轴横向力和脱轨系数，随着硬度增加，轮重减载率的变化更为明显。

Wheel abrasion is an important influencing factor of wheel-rail contact relationship, which has a direct impact on the vehicle's dynamic performance, operational safety and ride comfort. As an abnormal form of wheel wear, double pit wear not only affects the stability and comfort of the vehicle, but also increases the maintenance cost of the wheel, which has become an important problem in rail transportation operation. Based on the measured hardness data of subway wheel tread, the rigid-flexible coupling vehicle dynamics model and Archard wheel wear model were established considering the local hardness change of the wheel, the wear process of the wheel under different hardness conditions in the same mileage as well as the corresponding dynamics was analyzed, and the effect of the hardness change of the nominal rolling circle of the wheel tread on the double-pit wear was studied. The results show that with the accumulation of mileage, the depth of double-pit wear on the wheel tread shows a gradual increase. At the same operating mileage, the increase in hardness at the nominal rolling circle leads to a greater localized pressure during the contact between the wheel and the track, which intensifies the wear in the areas on both sides of the rolling circle. Compared to the axle transverse force and derailment coefficient, the change in wheel weight reduction rate is more pronounced with increasing hardness.