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1.路面滑动阻力系数轮胎受到路面的水平外力是胎冠与路面间的摩擦力造成的。铁路车辆受铁轨的约束,而汽车轮胎受胎冠橡胶与路面间巨大的摩擦力的制约,其间的摩擦力对车辆的运动状态影响很大。该摩擦力随路面、轮胎种类等有所不同。路面的滑动阻力系数以“滑阻值”(SN)表示。其测定方法,有使橡胶试片滑动的便携式滑阻值测量仪和在装着标准轮胎的二轮拖车
1. Pavement sliding resistance coefficient Tires subject to the horizontal force of the road surface is caused by the friction between the crown and the road. The railroad vehicles are restrained by the rails, while the car tires are restrained by the huge friction between the crown rubber and the road surface, during which the frictional force has a great influence on the movement state of the vehicle. The friction varies with the road surface, tire type and so on. The coefficient of sliding resistance of pavement is expressed as “slip resistance” (SN). The method of measurement includes a portable slip resistance measuring instrument for sliding a rubber test piece and a two-wheeled trailer fitted with a standard tire