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钢桥面铺装表面动水压力的存在,既会降低钢桥面铺装的抗滑性能,又会破坏防水黏结层并腐蚀钢板。为了研究不同工况对钢桥面铺装表面动水压力的影响,采用FLUENT建立轮胎在有水膜钢桥面铺装层表面行驶的有限元模型,模拟不同行驶速度、不同水膜厚度及不同花纹深度等条件,并计算钢桥面铺装层表面的动水压力值。研究结果表明动水压力的形成原因是:车辆高速行驶时,流向轮胎接地区域的水量超出轮胎花纹的排水能力,少量的水通过轮胎纵向花纹排出,大量的水在胎面前端滞留,形成动水压力;在车辆不产生滑水的情况下,水膜厚度越厚、行驶速度越高,产生的动水压力越大;轮胎花纹磨损量的增加对排水不利,已磨损轮胎产生的动水压力值比新轮胎产生的动水压力值大。
The existence of dynamic water pressure on the surface of steel bridge deck pavement will not only reduce the skid resistance of steel deck pavement, but also destroy the waterproof bonding layer and corrode the steel plate. In order to study the effect of different working conditions on the dynamic water pressure on the surface of steel bridge deck pavement, the finite element model of the tire running on the surface of paved steel deck with water-film steel was established by using FLUENT to simulate different driving speeds, different water film thickness and different Pattern depth and other conditions, and calculate the surface of the steel deck surfacing hydrodynamic pressure value. The results show that the hydrodynamic pressure is caused by the fact that the amount of water flowing to the ground contact area of the tire exceeds the drainage capacity of the tread pattern at a high speed and a small amount of water is discharged through the longitudinal pattern of the tire. Pressure; in the case of vehicles do not produce water skiing, the greater the thickness of the water film, the higher the speed of travel, the greater the hydrodynamic pressure; Tire tread wear increases the adverse impact on drainage, has worn the hydrodynamic pressure generated by the tire value The hydrodynamic pressure generated by the new tire is larger.