基于“轮胎-VOF”模型的雨天安全行车速度阈值研究  

Study on safe driving speed control strategy in rainy days based on“Tire-VOF”model

作　　者：史剑丽 刘轲 张雪洁 SHI Jianli;LIU Ke;ZHANG Xuejie(Yangquan Branch of Shanxi Highway Bureau,Yangquan,Shanxi 045000,China;School of Civil Engineering and Transportation,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]山西省公路局阳泉分局,山西阳泉045000 [2]河北工业大学土木与交通学院,天津300401

出　　处：《河北工业大学学报》2020年第5期85-94,共10页Journal of Hebei University of Technology

基　　金：国家自然科学基金(51108011);河北省重点研发计划(19211210D);天津市交通委科技计划(2018-34)。

摘　　要：为提升高速公路雨天行车安全性,以交通工程、流体动力学等理论为基础,通过FLUENT软件构建了“移动水坝”作用下的“轮胎-VOF”模型并进行了仿真,确定了不同降雨强度下内侧车道小客车的滑水速度阈值。研究结果表明:当水膜厚度和轮胎花纹厚度不变时,动水压强随车速的增加而增加,且水膜厚度越大增加速度越快,逐渐转为线性关系;当水膜厚度和车速不变时,花纹厚度越深,行车越安全,但当水膜厚度较大时,花纹厚度作用不明显;当轮胎花纹厚度和行车速度不变时,动水压强随水膜厚度增加而增加,且行车速度越大增加就越快,后期逐渐平缓;最终得到不同降雨等级下小客车的速度限速计算控制阈值,为高速公路的安全管理提供指导。In order to improve the safety of highways on rainy days,based on the theory of traffic engineering and fluid dynamics,the"Tire-VOF"model under the action of"mobile dam"was constructed by FLUENT software and the water skiing speed threshold of the inside lane passenger car under different rainfall intensity is determined.The results show that when the thickness of water film and the thickness of the tread pattern are constant,the dynamic water pressure in⁃creases with the increase of the speed,and the larger the thickness and the speed of the water film are,the deeper the thickness of the water film and the speed of the car become,the safer driving is,but when the thickness of the water film is larger,the pattern thickness is thicker,the effect is not obvious;when the tread thickness and driving speed are con⁃stant,the dynamic water pressure increases with the increase of the thickness of the water film,and the faster the driving speed increases,the later gradually becomes slow.Finally,the speed limit calculation control threshold of the passenger car under different rainfall levels is obtained,which provides guidance for the safety management of the high speed high⁃way.

关 键 词：流体动力学 移动水坝 FLUENT仿真 水膜厚度 动水压强 临界滑水限速 

分 类 号：U491.2[交通运输工程—交通运输规划与管理]