考虑横风作用的公路平曲线最小半径研究  

Research on Minimum Radius of Highway Horizontal Curve with Crosswind Considered

作　　者：许金良[1] 王恒[1] 赵利苹[2] 韩跃杰[1] 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064 [2]郑州航空工业管理学院土木建筑工程学院,河南郑州450015

出　　处：《中国公路学报》2014年第1期38-43,共6页China Journal of Highway and Transport

基　　金：交通运输部西部交通建设科技项目(2009 318 000 102);中央高校基本科研业务费专项资金项目(CHD2011ZD021;2013G1211003)

摘　　要：为研究横风作用对路线设计指标的影响,以小客车和集装箱车为代表车型,分别制作了1∶4和1∶12的试验模型,采用风洞试验方法,以8m·s-1和13m·s-1两种风速,于0°和90°两个方向分别进行了均匀流的风场模拟,获得了小客车和集装箱车受到的风作用力。基于汽车动力学理论,分析了汽车在弯道路段的行驶状态,建立了考虑横风影响的汽车稳定行驶模型,计算了不同风速和运行速度下平曲线最小半径的极限值和一般值。研究结果表明:车辆受到的风作用力随风等级增加而增加;相同等级的风作用下,集装箱车受到的风作用力远大于小客车受到的力;公路设计速度越高,风力对其平曲线最小半径影响越大;风力超过8级时,考虑风作用的最小半径极限值已超过《公路工程技术标准》规定的一般值。研究结果可为风区公路安全性设计提供指导。To study the effect of crosswind on alignment design indexes, a 1 ： 4 passenger car model and a 1 ： 12 container truck model were built respectively, which were taken as the representative types. Wind force on vehicles in simulated uniform wind field was obtained by wind tunnel test, which took two kinds of wind velocities as 8 m . s-1 and 13 m. s 1, and yaw angles as 0° and 90°. Based on dynamics principle, vehicle stability driving model was established with the consideration of crosswind by analyzing its driving state on curved section of highway. Moreover, the limit minimum radii and common radii of horizontal curve were calculated in the conditions of different wind scales and vehicle driving speeds. The results show that wind force increases as its scale, and its value on container truck is larger than that on passenger car under the same wind scale. The higher the design speed of highway, the more influence of crosswind on the minimum radius. The limit minimum radius with crosswind considered is greater than the common minimum radius in the standard when the wind scale is over 8. This research can provideguidance for safety design of highway in the wind area.

关 键 词：道路工程 平曲线最小半径 风洞试验 横风作用 横向力系数 

分 类 号：U412.34[交通运输工程—道路与铁道工程]