冰雪路面公路平曲线路段限速仿真

为了提高冬季北方地区公路的行车安全,减少交通事故,对冰雪路面平曲线路段展开限速研究．应用车辆运动学理论,考虑驾驶员在弯道驾驶车辆的特点,分析车辆在冰雪路面转弯行驶特性,建立车辆在平曲线路段行驶时的运动学模型．选择载货汽车和轿车两种车型,松软雪路面、压实雪路面和冰路面3种路况,分别建立车辆行驶速度与平曲线设计指标的关系模型．选取6％、8％和10％ 3种超高值的平曲线路段,利用Matlab仿真技术对车辆限速模型进行求解,并对车速与圆曲线半径及超高的相关性进行分析．以此为基础,提出车辆在松软雪路面、压实雪路面和冰路面3种路况下,不同圆曲线半径的相应安全行驶速度,为科学合理地确定冰雪路面平曲线路段的车辆限速值提供理论依据．

Speed limit simulation on highway horizontal curve section under the condition of ice and snow pavement

In order to improve the highway safety and reduce traffic accidents in the northern region in winter,speed limit of horizontal curve section on ice and snow pavement was studied.Appling theory of vehicle kinematic,and considering drivers’ driving characteristics at the curve of the road,vehicle’s turning characteristic were analyzed on the snow and ice pavement,and the vehicle’s kinematics model on horizontal curve section was established.Freight truck and passenger car were selected as experimental vehicles,and loose snow pavement,compacted snow pavement and ice pavement were selected as experimental pavement.The relation models were established between speed and horizontal curve design index.Selecting three kinds of curve sections with the superelevation value of 6%,8% and 10%,vehicle speed-limit control model was solved by Matlab simulation technology,the correlation of speed,circular curve radius and superelevation was analyzed.Safe driving speeds according to different circular curve radius were given on loose snow pavement,compacted snow and ice pavement.It can provide theoretical basis for determining scientific and reasonable speed limit value on highway horizontal curve section under the condition of ice and snow pavement.