Taking all automobile manufacturers and measured of the wheelbase, axle load, given the statistical results of the wheelbase vehicle and the ratio of axle load distribution.
综合各汽车厂家和实测的轴距、轴重，给出了各代表车型的轴距、轴重分配比例的统计结果。
2
When under the same axle load, if the wheel rolling speed gets higher, the adhesion coefficient declines as the ratio of the mean asperities contact pressure to the total pressure becomes smaller.
研究发现：相同轴重下，滚动速度越大，粗糙峰接触压力与总压力的比值越小，导致轮轨之间的粘着系数下降；
3
When under the same speed, if the axle load gets weighter, the adhesion coefficient increases as the ratio of the mean asperities contact pressure to the total pressure becomes bigger.