一、概述 为了使机车车辆平稳安全地通过铁路曲线,尽可能地减少轮轨磨耗及机车车辆对轨道的破坏,在半径小到一定数值的曲线上,必须加宽轨距。但轨距加宽过大,可能增大外轨的导向力,容易造成行车摇晃。特别是随着行车速度的提高,这种摇晃不仅会加速轨道的破 I. Overview In order to make the locomotive vehicle pass the railway curve smoothly and safely, it is necessary to reduce the wheel-rail abrasion and the damage of the rolling stock to the rail as much as possible. In the curve with a small radius to a certain value, the gauge must be widened. However, widening gauge is too large, may increase the guidance of the outer rail, easily lead to traffic jitter. Especially with the increase of driving speed, this kind of shaking will not only accelerate the breaking of the track