车轮踏面磨耗导致车轮外形改变，使其滚动圆直径产生偏差，对车辆系统的动力学特性影响较大。

Wheel tread wear leads to change of the wheel profile and rolling diameter, which influences the dynamic behaviors of railway vehicles seriously.

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机车轮对的检修是十分重要的，轮缘磨耗、踏面磨耗等是重要的测量参数。

To examine locomotive wheels is very important, brim abrasion and fade abrasion of the wheels are the important parameters.

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与新用车轮踏面相比，测试得到的磨耗后车轮踏面在其名义直径位置凹陷区域附近容易形成踏面两点接触。

Compared to the new wheel tread, the worn tread is easy to form two-point contact nearby the depression area of the nominal diameter position of wheel tread.

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