基于临界滑水速度的湿滑路面全域滑水风险量化评价

Quantitative Evaluation of Hydroplaning Risk on Wet Pavement Based on Critical Hydroplaning Velocity

摘要:

基于修正LuGre摩擦模型提出临界滑水速度的快速计算方法，以临界滑水速度为滑水风险事件发生的判断指标；基于湿滑路段水膜厚度分布以及车速、轮迹等车辆行驶状况的概率模型，计算滑水风险事件发生的概率，从而对滑水风险进行量化，并根据风险概率将滑水风险划分为5个等级。结果表明：临界滑水速度主要受水膜厚度的影响，与路面的高程特征密切相关；当路面存在车辙、坑槽等表面病害时，病害区域的临界滑水速度显著下降。车辆滑水风险与临界滑水速度分布基本一致，但轮迹带区域的风险相对较高；降雨强度较大时，无病害或低病害路段的低风险区域超过96%，路段整体处于低风险等级，车辙等严重病害处出现大量中高风险区域，导致路段整体风险等级提高。

Abstract:

A modified LuGre friction model was established and used to calculate the critical hydroplaning velocity， which is an indicator for determining the occurrence of hydroplaning events. Based on the water film thickness distribution and the probabilistic model of speed and wheel track， the probability of hydroplaning events was calculated to quantify the risk of hydroplaning， and the hydroplaning risk was set to five levels according to the probability. Results show that the critical hydroplaning velocity is significantly affected by the water film thickness， and related to the elevation of road sections. The critical hydroplaning velocity decreases in the disease area. The distribution of vehicle hydroplaning risk and critical hydroplaning velocity is basically the same， but the vehicle hydroplaning risk in the wheel track zone is relatively high. Meanwhile， at high rainfall intensity， more than 96% of disease-free or low-disease road sections are at low hydroplaning risk. However， in potholes， ruts and other road disease areas， the hydroplaning risk increases significantly， and high-risk areas appear， resulting in an increase of the road risk level.