基于道路几何参数的弯道临界安全车速模型  

Critical safety speed model of corners based on road geometry parameters

作　　者：何江李 龚波[1,2] 朱彤 杨晨煊[1,2] 孙一帆 

机构地区：[1]长安大学汽车学院,陕西西安710064 [2]长安大学汽车运输安全保障技术交通行业重点实验室,陕西西安710064

出　　处：《长沙理工大学学报（自然科学版）》2017年第4期75-82,共8页Journal of Changsha University of Science and Technology:Natural Science

基　　金：国家自然科学基金资助项目(51178054)

摘　　要：为了准确掌握不同道路几何参数与弯道临界安全行车速度之间的关系,建立了一个多维度道路设计临界安全速度数学计算模型。通过Trucksim软件选取某大型车辆分别建立不同道路超高、弯道半径与安全行车速度的仿真试验,采用最小二乘法对数据散点进行拟合与验证,然后通过正交仿真试验得出交互影响下的仿真数据,曲线拟合出针对道路几何参数的二元多项式回归数学模型。将《公路路线设计规范》中一般值和极限值路况下设计安全速度和该模型计算出的临界安全车速进行线性对比,并采用某工况通过本研究的计算模型得出的安全车速与其他具有代表性的传统计算模型和Lee模型进行对比,结果表明,本研究数学模型是有效可靠的,在某工况下精度误差最小;并且随着弯道半径和超高的提高,临界安全车速与设计安全速度的差距在逐渐增大。In order to accurately grasp the relationship between the different roads and the critical safety driving speeds of a curve, a calculating the critical safety speed of multi dimension road design the Trucksim software, a large-scale vehicle was used to establish t ferent ramp turn supper elcvation, radius of the curve and safe driv lation test scatter was fitted and verified by the least squares metho geometric parameters of mathematical model for is established. Through he simulation test of dif- ing speed, and the simu- d. Then, the experimen- tal data under the influence of interaction are obtained by orthogonal simulation experiment. The binary polynomial regression mathematical model for road geometry is fitted through the curve. The design safety speed of the general value and the limit road conditions in the ＂ Design Specification for Highway Alignment ＂ is linear compared with the calculated safe speed of the model, and the safety speed obtained by the calculation model is represented by other traditional computational that the mathematical model is under a certain condition. With curve, the critical safety speed model and the Lee model are compared. The results show effective and reliable, and the accuracy error is the smallest the increase of the ramp turn supper elcvation, radius of the gradually increases with the design safety speed.

关 键 词：交通安全 道路几何参数 临界安全车速 交互仿真 弯道侧翻 模型 

分 类 号：U491.2[交通运输工程—交通运输规划与管理]