基于FL U EN T软件模拟了轮胎滑水产生过程，并计算了不同轮胎花纹、不同车速及不同水膜厚度等条件下轮胎所受动水压强的大小。模拟分析结果表明：①复合花纹轮胎最不易发生滑水，横向花纹次之，纵向花纹最易滑水；②当水膜厚度不变时，同一轮胎所受动水压强随车速的增加而增加，且增长速度随着车速的增加而增加；③当车速不变时，同一轮胎所受动水压强随水膜厚度的增加而增加。以动水压强等于轮胎内部压强时轮胎发生滑水为判断标准，建立了轮胎临界滑水速度与水膜厚度的关系，并根据已有水膜厚度方程，推算出了临界滑水速度与降水量的关系。%In this paper ,FLUENT software is utilized to simulate the hydroplaning process of three kinds of differ-ent vehicle tires ,i .e .tires with the longitudinal texture ,horizontal texture and multi texture ;the relative parameters such as the dynamic water pressure ,the vehicle speed and the water film thickness are calculated .The results of simula-tion show that :(a) Among the three different kinds of tires ,one with the multi texture has the best hydroplaning resist-ant property while one with longitudinal texture has the worst anti-hydroplaning performance ;(b) The dynamic water pressure increases with the increasing vehicle speed when the water thickness remains stable ,and the increasing rate of dynamic water pressure increases with the driving speed as well ;(c) The dynamic water pressure increases with the thickness of water on condition that the vehicle speed remains stable .Based on the principle that the hydroplaning phe-nomenon occurs while the dynamic water pressure is equal to the internal pressure of vehicle tires ,the relationship be-tween the critical hydroplaning speed and the thickness of water film is established in this paper .Then ,based on the ex-isting equation of water film thickness ,the relationship between the critical hydroplaning speed and the precipitation is al-so calculated .
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