高速公路平竖曲线组合行车舒适性研究

Research on Riding Comfort of Highway Combining Plane and Vertical Curve

公路线型最终是以平面线型和纵断面线型组合成的三维立体线型而表现出来的,平纵面线型组合的好坏,直接影响到公路线型的优劣和行车的舒适性。选用横向加速度及其时变率作为评价指标,根据平曲线与竖曲线不同的重叠情形,建立不同工况的分析模型,考虑汽车速度变化的影响,推导出不同工况下的车体横向加速度及其时变率的一般计算公式,同时选用AD-AMS/CAR软件进行整车仿真。通过对比分析,工况4的平曲线、竖曲线重叠设置为最优。

Highway alignment is shown by flat line and longitudinal line combination into three-dimensional alignment. The combination of alignment directly affects the quality of highway alignment and the comfortable- ness of driving. Based on different overlap situation, considering the influence of the speed change of automo- biles, this paper chooses lateral acceleration and lateral change of acceleration as evaluation index, establishes different analysis models, infers the general formula for chassis lateral acceleration and the lateral change of ac- celeration. Then it selects the software ADAMS/CAR to establish simulation model and make full-vehicle simulation. Through comparison and analysis of the results obtained, this paper draws the conclusion that operating mode 4 is superior to other overlaps modes.