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动水压强是影响汽车雨天滑水的直接因素。通过建立纵横向花纹轮胎有限元模型,利用Fluent软件模拟不同行驶条件下轮胎所受的动水压强大小以及轮胎不同部位水流速度的分布规律,并根据数据结果回归得出了行车速度、水膜厚度和轮胎花纹深度与动水压强的关系式。结果表明:轮胎所受到的动水压强取决于水膜厚度、胎纹深度及行车速度;随着水膜厚度的增加,动水压强与车速的关系逐渐由非线性向线性转变;行车速度对动水压强的影响最为明显,仅改变轮胎花纹深度不能完全避免车辆滑水。
Hydrodynamic pressure is a direct factor affecting the water skiing in the car. Through the establishment of the finite element model of longitudinal and transverse tread tire, the use of Fluent software to simulate the dynamic pressure of the tire under different driving conditions and the distribution of water flow velocity in different parts of the tire. Based on the data, the velocity, Thickness and tire tread depth and hydrodynamic pressure relationship. The results show that the hydrodynamic pressure on the tire depends on the thickness of the water film, the depth of the tread and the driving speed. With the increase of the thickness of the water film, the relationship between the hydrodynamic pressure and the speed of the vehicle gradually changes from a nonlinear to a linear one. The effect of water pressure is most obvious. Only changing the tire tread depth can not completely avoid water skiing.