对于工况参数，主要分析了横移量、轴重和轨底约束对轮轨滚动接触应力场的影响。
The effects of case parameters on the distribution of elastic-plastic stress hi railhead are analyzed including lateral displacement, gross rail load on axle and constrained conditions of rail bottom.
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 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.
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