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；
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.
相同速度下，轴重较大，粗糙峰接触压力占总压力的比值也越大，此时粘着系数也较大。
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.
相同速度下，轴重较大，粗糙峰接触压力占总压力的比值也越大，此时粘着系数也较大。
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