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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。
In order to study the influence of cross wind on the route design indexes, the test models of 1: 4 and 1: 12 were made with passenger car and container car as the representative models respectively. The wind tunnel test was used to test the design parameters of 8m · s-1 and 13m · S-1 two kinds of wind speed, in both 0 ° and 90 ° were carried out uniform wind flow field simulation, access to passenger cars and container cars by the wind force. Based on the theory of vehicle dynamics, the driving status of the car in curved road sections is analyzed, and a stable driving model of the car considering the influence of cross wind is established. The limit values and the general values of the minimum radius of the flat curve under different wind speed and running speed are calculated. The results show that the wind force on the vehicle increases with the increase of the wind level. Under the same level of wind, the wind force on the container vehicle is far greater than the force applied to the passenger car. The higher the highway design speed, The greater the influence of the minimum radius; when the wind power exceeds 8, the minimum radius limit considering wind action has exceeded the general value stipulated in “Technical Standards for Highway Engineering”. The results can provide guidance for the safety design of wind-driven highway.