考虑横风作用的公路平曲线最小半径研究

发布时间：2018-07-08 19:58

本文选题：道路工程 + 平曲线最小半径　；参考：《中国公路学报》2014年01期

【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。
[Abstract]:In order to study the influence of crosswind on the route design index, a model of 1: 4 and 1: 12 was made with small passenger cars and container cars, and the wind tunnel test method was used to simulate the wind field of uniform flow in 0 and 90 degrees with two kinds of wind speed, 8m S-1 and 13m. S-1. The passenger car and container car were obtained. Based on the theory of automobile dynamics, the driving state of the car in the bend section is analyzed. A stable driving model considering the effect of the wind is established. The limit value and the general value of the minimum radius of the flat curve under different wind speeds and operating speeds are calculated. The results show that the wind force is increased with the wind grade. Adding and increasing, the wind action force of the container car is far greater than the force received by the small passenger car under the same grade of wind; the higher the design speed of the highway, the greater the influence of the wind on the minimum radius of the flat curve. When the wind is over 8, the minimum radius limit of the wind effect exceeds the general value stipulated in the technical standard of the highway engineering. The results can provide guidance for the safety design of the wind area.
【作者单位】：长安大学特殊地区公路工程教育部重点实验室;郑州航空工业管理学院土木建筑工程学院;
【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)
【分类号】：U412.34

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