缓和曲线长度对车辆行驶轨迹的影响  

Effect of Spiral Transition Curve Length on Vehicle Path

作　　者：林雨[1] 杨轸[2] 潘晓东[2] 

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001 [2]同济大学交通运输工程学院,上海201804

出　　处：《西南交通大学学报》2011年第2期200-204,共5页Journal of Southwest Jiaotong University

基　　金：安徽高校省级自然科学研究项目(KJ2011A081)

摘　　要：为揭示自由流交通状态下,缓和曲线长度对车辆行驶轨迹的影响规律,在预瞄最优曲率模型的基础上,引入S-K（弧长-曲率）平面线形模型,提出了面向公路路线安全评价的驾驶员方向控制模型.仿真结果表明：车辆进入曲线段时,行驶轨迹存在朝曲线内侧偏移的运动趋势;出曲线段时,车辆行驶轨迹趋于朝曲线外侧偏移.缓和曲线长度对车辆行驶轨迹的影响显著,缓和曲线越长,车辆行驶轨迹侧向偏差越小,反之则越大.对于二级公路对称基本型平曲线设计,缓和曲线长度建议采用0.4~0.6倍圆曲线半径为宜.In order to reveal the influence rule of spiral transition curve length on the path of a vehicle under free flow traffic states,a driver direction control model for highway alignment safety evaluation was put forward on the basis of the preselect optimal curvature method and by introducing the horizontal curve length-curvature alignment model.The simulation results show that when a vehicle enters a curve,its path has a tendency to shift inward the curve,while its path tends to shift outward the curve as it exits the curve.The length of a spiral transition curve has a significant impact on the path of a vehicle,the longer the spiral transition curve is,the smaller the lateral deviation of vehicle path is,whereas the greater it will be.To a symmetrical basic horizontal curve of second-class highways,the length of a spiral transition curve is suggested to be 0.4 to 0.6 times the radius of the curve.

关 键 词：缓和曲线 车辆行驶轨迹 平面线形 几何设计 驾驶员模型 交通安全 

分 类 号：U412[交通运输工程—道路与铁道工程] U491