道路组合线形对交通安全的仿真分析

Analysis of the simulation of road combination alignment of driving safety

为了让车辆能够以安全速度通过弯坡组合线形路段,在仿真软件ADAMS/Car中建立车辆模型、道路模型以及车路耦合模型,分别对选取的半径、超高和坡度与安全速度阈值之间的关系进行研究,并通过正交分析的方法,结合选取的不同水平因素组合的仿真结果,建立道路线形参数与安全速度的统计模型.仿真的结果表明:弯道半径、超高与安全速度阈值之间呈正幂函数关系,坡度与安全速度阈值之间呈负幂函数关系,安全速度阈值与半径、超高以及坡度的统计模型为三元非线性.

We establish vehicle model ,road model and vehicle-road coupling model by ADAMS/Car ,and then study the relationship among the selected radius ,superelevation and gradient with the threshold for the vehicle pass through the combination alignment by safety speed .To build the statistical model amongthe safety velocity's threshold with road linear parameters ,on the ba‐sis of simulation result of different combination of factors and levels by orthogonal analysis .The simulation results show that they are positive power function relationship between radius and ve‐locity threshold ,superelevation and velocity threshold;it is negative pow er relationship betw een gradient and velocity threshold;the statistical model amongradius ,superelevation ,gradient and velocity threshold is three variables nonlinear .