摘要
针对积水路面行车轮胎产生动水压力易导致水损害和车辆打滑的问题,探索车辆产生滑水风险的速度和路面材料受动水冲刷的损伤过程,以奥迪A4L和陕汽重卡德龙F3000两种型号的车为主要研究对象,运用AH-E型传感器在水泥混凝土路面上实测二者在不同行驶速度下的动水压力;基于COMSOL Multiphysics软件平台建立轮胎-水膜-道面相互作用的流固耦合数值模型,对动水压力的影响因素进行规律性分析,并计算滑水风险速度.结果表明:动水压力随水膜厚度、行车速度和车辆轴载的增加而增大;轮胎-水膜-道面相互作用区域划分为正动水压力区和负动水压力区,二者共同作用,对路面材料产生较强的动水冲刷;随着路表水膜厚度的增加,汽车发生滑水风险的速度不断减小,相同速度下小车比卡车更易发生滑水风险.
Aiming at the fact that instantaneous dynamic water pressure caused by tires is the main reason for the water-caused damage of pavement materials and the skid of vehicles that may endanger the safety of vehicles in rainy condition, this paper explores the risk speed of water-skidding and the water-caused damage process of the pavement material subjected to dynamic water erosion. In the investigation, vehicles with the types of Audi A4 L and Shaanxi Auto Catron F3000 were used as the main research objects, and the AH-E type instantaneous dynamic water pressure sensor was adopted to measure the instantaneous dynamic water pressure on the cement concrete road surface of the two vehicles at different driving speeds. Then, based on the COMSOL Multiphysics software platform, a fluid-structure interaction analysis model of the tire-water film-road surface interaction was established and was used to analyze the regularity of the influencing factors of instantaneous dynamic water pressure on road surface, and to calculate the risk velocity of water-skidding. The results show that(1) the instantaneous dynamic water pressure on road surface increases with the increase of water film thickness, driving velocity and vehicle axle load;(2) under the effect of positive dynamic water pressure zone and negative dynamic water pressure zone that both exist in the tire-water film-road surface interaction region, the dynamic water is to form a strong scour circulation function in the pavement material;(3) with the increase of the thickness of water film layer on road surface, the speed at which the vehicle may take the risk of water-skidding is decreasing;and(4) at the same speed, the sedan is more prone to water-skidding risks than the truck.
作者
申爱琴
宋攀
郭寅川
李鹏
SHEN Aiqin;SONG Pan;GUO Yinchuan;LI Peng(Key Laboratory of Highway Engineering in Special Region of the Ministry of Education,Chang’an University,Xi’an 710064,Shaanxi,China;Louisiana Transportation Research Center,Louisiana State University,Baton Rouge LA70803,Louisiana,USA)
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第11期92-101,共10页
Journal of South China University of Technology(Natural Science Edition)
基金
国家自然科学基金青年基金资助项目(51608047)
国家自然科学基金资助项目(51278059)~~
关键词
道路工程
动水压力
流固耦合
有限元
AH-E型传感器
road engineering
dynamic water pressure
fluid-structure interaction
finite element
AH-E type sensor
