一、绪言为了易于通过曲线,铁道车辆车轮一般均设计成锥形的。因而,当列车运行时,即使在直线轨道区段,轮对也存在着几何蛇行运动的特性,而列车高速运行时,由于惯性力的作用,轮对还产生自激蛇行运动。轮对发生自激蛇行运动时,不但使车辆运行平稳性恶化,而且也有脱轨的危险性。所以,抑制轮对自激蛇行运动是一个很重要的问题。关于蛇行运动,以前已有许多重要的研究,并已应用于高速铁道车辆以及防止脱轨 First, the introduction In order to easily pass the curve, the railway vehicle wheels are generally designed to be tapered. Therefore, when the train is running, the wheelset has the feature of geometric meandering motion even in the straight track section. When the train runs at high speed, the wheelset also generates a self-excited meandering motion due to the inertia force. When the self-excited snake-wheel exercise occurs on the wheelset, not only the smooth running of the vehicle is deteriorated, but also the danger of derailment. Therefore, it is a very important issue to restrain the wheel from self-excited snake. There have been many important studies on snake-walking that have been applied to high-speed railway vehicles and to prevent derailment