双车道公路小半径曲线段横向加速度特性

Lateral Acceleration Characteristics of Curves With Small Radius on Two-lane Highway

为研究横向加速度在双车道公路小半径曲线段上的变化特性以及与横向偏移量的关系,运用驾驶模拟器进行小半径曲线段上车辆行驶的仿真实验,获得车辆的横向加速度与横向偏移量.针对双车道公路小半径曲线段横向力作用大的特点,对曲线段上的横向加速度变化特性进行分析,通过Matlab软件建立车辆横向加速度预测模型、横向加速度与横向偏移量相关性的数学模型.结果表明,随着车速的增加,横向加速度增大,在圆缓(YH)点附近横向加速度与横向偏移量达最大值,圆曲线段的横向加速度与横向偏移量成对数正相关关系.研究成果为评价双车道公路小半径曲线段行车安全性提供了理论支持.

To study the characteristics of lateral acceleration on the curve of small radius and the relationship between the lateral acceleration and lateral offset, simulation experiment of vehicle driving on curve section with small radius was carried out by driving simulator, and the lateral acceleration and lateral offset of the vehicle were obtained. Due to the small radius of the two-lane highway curved section by the lateral force, the characteristics of transverse acceleration on the curve segment were analyzed, and a mathematic model of vehicle lateral acceleration prediction and the correlation between lateral acceleration and lateral offset was established by using Matlab software. Results show that the lateral acceleration increases with the increase of the velocity, the lateral acceleration and lateral offset reach the maximum in the point of curve to spiral, and the lateral acceleration of circular curve segment has a logarithmic positive correlation with lateral offset. The results provide theoretical support for the safety analysis and accident prevention of two-lane road with small radius curve.