摘要
Hydroplaning speed can be affected by pavement texture depth,thickness of water film,tire pressure and tread depth.In this study,to understand the influence of pavement texture on the hydroplaning speed,a new lab-scale apparatus has been designed and manufactured.The lack of proportion between linear movement of vehicle shaft and the wheel rotation was found to be a good index to determine hydroplaning threshold.A 5%drop in the ratio of wheel-to-axle rotation has been assumed as an index to determine hydroplaning threshold.Based on the measures,a simplified model was developed that is able to predict the hydroplaning speed depending on pavement's texture characteristics.The results indicated that a 77%increase in mean texture depth cause 9%increase in hydroplaning threshold speed.
路面纹理深度、水膜厚度、轮胎压力、胎面深度等因素都会影响打滑速度。为了解路面结构对滑行速度的影响,设计并制造了一种新型的实验装置。研究发现,车轴的直线运动与车轮的转动之间没有比例关系,是确定滑行阈值的一个很好的指标。假定轮轴旋转比下降5%作为确定滑行阈值的指标,在此基础上,建立了一种简化模型,该模型可以根据路面的纹理特征来预测滑行速度。结果表明,平均纹理深度增加77%,可导致水平面阈值速度增加9%。
