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磨耗后的车轮接触面,是内凹圆弧的旋转形成面,有两种主曲率。钢轨顶面本来有一种横向主曲率,由于轮重压得线路下沉,使钢轨在纵向朝上弯曲而抱拥车轮,出现一种纵向主曲率。轮对轴线并不垂直于线路纵
After wear the wheel contact surface, is the formation of concave circular arc rotation, there are two main curvature. Originally there was a transverse principal curvature on the top of the rail. A longitudinal principal curvature appeared when the rail was bent in the longitudinal direction and the wheel was clinging to the wheel due to the sinking of the wheel weight. Wheel axis is not perpendicular to the vertical line