高速公路同向双向路拱路面小客车换道舒适性和安全性分析  

Analysis on Comfort and Safety of Passenger Cars Changing Lanes on the Same Direction and Two-way Arch Pavement of Expressway

作　　者：吴东平[1] 胡祖敏 陈钦 徐进[2,3] WU Dong-ping;HU Zu-min;CHEN Qin;XU Jin(China Communications Second Highway Survey and Design Institute Co.,Ltd.,Wuhan 430056,China;College of Traffic and Transportation,Chongqing Jiaotong University,Chongqing 400074,China;Chongqing Key Laboratory of“Human-vehicle-road”Cooperation and Safety for Mountain Complex Environment,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]中交第二公路勘察设计研究院有限公司,武汉430056 [2]重庆交通大学交通运输学院,重庆400074 [3]重庆交通大学,山区复杂道路环境人车路协同与安全重庆市重点实验室,重庆400074

出　　处：《科学技术与工程》2024年第31期13568-13578,共11页Science Technology and Engineering

基　　金：重庆市高校创新研究群体项目(CXQT21022);中交城乡建设规划设计研究院有限公司科技研发项目(E1230249)。

摘　　要：为了分析同向双路拱路面小客车换道行驶舒适性与安全性,使用Carsim仿真软件建立了小客车换道轨迹模型、车辆动力学模型、同向双路拱和单向坡道路模型,以平曲线极限半径值作为换道轨迹半径值,开展多工况跨路拱换道行驶试验,并通过实车驾驶实验对仿真模型进行了准确性验证。结合横向加速度、横摆角速度、峰值附着系数和横向荷载转移率等四项指标变化情况和判断标准对同向双路拱路面小客车换道行驶状态进行了分析。研究结果表明:道路类型对车辆换道行驶稳定性影响较大,综合评价指标与回正增益系数的变化情况,在同向双路拱路面条件下,SUV(suburban utility vehicle)和微型面包车(minivan)换道行驶稳定性均能满足安全行驶要求;换道行驶稳定性由高到低对应的路面类型为:单向坡路面>抛物线型路拱路面>折线型路拱路面;折线型路拱路面条件下,SUV换道行驶稳定性优于Minivan。超速行驶对小客车换道行驶稳定性有显著影响,超速程度越高,稳定越差,即当基础车速为100 km/h和120 km/h时,超速10%和20%时,车辆换道行驶过程中均不存在侧滑风险,但车辆稳定性均处于较差状态。In order to analyze the comfort and safety of passenger cars changing lanes on double-arch road surface in the same direction,Carsim simulation software was used to establish the track model of passenger cars changing lanes,vehicle dynamics model,double-arch road models in the same direction and one-way slope road models.The limit radius of flat curve was taken as the track radius value of lane changing,and the cross-arch road changing test was carried out in multiple working conditions.And the accuracy of the simulation model was verified by the real car driving experiment.The changing state of passenger car on double-arch road in the same direction was analyzed according to the four indexes including lateral acceleration,yaw velocity,peak adhesion coefficient and lateral load transfer rate.The results show that the road type has a great influence on the stability of vehicle lane changing.According to the changes of evaluation index and return gain coefficient,the stability of SUV and Minivan lane changing can meet the requirements of safe driving under the condition of double-arch road surface in the same direction.The road types from high to low for lane change stability are as follows:one-way slope road>parabolic arch road>curved arch road;Under the condition of curved road arch,the stability of SUV is better than Minivan.Overspeed has a significant impact on the stability of passenger cars changing lanes.The higher the overspeed,the worse the stability,that is,when the basic speed is 100 km/h and 120 km/h,when the overspeed is 10%and 20%,there is no sidespoiling risk in the process of lane changing,but the vehicle stability is in a poor state.

关 键 词：道路工程 高速公路改扩建 同向双路拱 Carsim仿真 车辆稳定性 小客车 

分 类 号：U412.1[交通运输工程—道路与铁道工程]