Changes of the contact point of the most used wheelset in our country is calculated, and find that the LM profile has a better ability to keep the wheel at the center location of the line.

• 计算了铁路上常用的两种踏面轮对（锥形踏面和磨耗型踏面）在蛇行运动时的接触点变化，通过计算发现在轮对横移量较小时，两者的差别不大，但随着横移量的增大，磨耗型踏面轮对左右轮的滚动圆半径差迅速增大，从而使得轮对能够迅速恢复对中；