论文部分内容阅读
在寒冷地区,冬季漫长,气温较低且降雪量大,路面不能给行车提供足够的摩擦条件,使在曲线路段上的行车速度和行车安全难以保证。文中结合寒冷地区冬季路面附着系数降低这个现象,分析汽车在水平路面转弯外侧制动时的受力情况,建立设超高圆曲线汽车制动模型,然后通过实测数据确定车辆结构、车速、附着系数、视距、制动时间等参数,采用仿真的方法得出圆曲线设计指标的理论安全值,最后结合驾驶舒适性给出了设置超高圆曲线半径设计建议值,为寒冷地区道路平面线形设计提供一定的参考依据。
In cold areas, long winters, low temperatures and large amounts of snowfall can not provide sufficient friction conditions for driving, making it difficult to guarantee the driving speed and driving safety on curved sections. In this paper, the phenomenon that the adhesion coefficient of winter pavement is reduced in cold area is analyzed, the force condition of the car when it is braked on the horizontal road surface is analyzed, and the brake model of hypercagonal curve automobile is established. Then the vehicle structure, speed, , The line of sight, the braking time and other parameters, the theoretical safety value of the circular curve design index is obtained by the simulation method. Finally, the recommended design value for setting the radius of the super-circular curve is given in combination with the driving comfort. Provide some reference.