摘要
文中针对双向四车道保通中央分隔带开口展开研究.采集开口处自然车流各断面车速数据,分析了大(小)型车运行特征.由于80 m长度的开口上车辆存在失稳风险,因此设计了60,80 km/h下开口线形组合方案,应用车辆动力学仿真,根据横摆角速度、侧向加速度和车身侧倾角3个稳定性指标建立动态综合评价值.结果表明:中央分隔带保通开口处的交通流存在显著的超速特征;开口长度由164增长至382 m时,开口处车辆运行稳定性增大;当小型车比例大于50%时,长度建议值为164 m,大型车比例大于50%时,长度建议值为281 m.
Based on the speed data of various sections of natural traffic flow at the opening,the running characteristics of large(small)vehicles were analyzed.Because of the risk of vehicle instability on the 80-meter-long opening,the combination scheme of opening alignment at 60 and 80km/h was designed.Using vehicle dynamics simulation,a dynamic comprehensive evaluation value was established according to three stability indexes:yaw rate,lateral acceleration and body roll angle.The results show that the traffic flow at the opening of the central partition belt has obvious overspeed characteristics.When the length of the opening increases from 164 to 382m,the vehicle running stability at the opening increases.When the proportion of small cars is greater than 50%,the recommended length is 164m,and when the proportion of large cars is greater than 50%,the recommended length is 281m.
作者
刘兵
徐灵欣
陈晨
夏晶
郑凯陶
张腾飞
LIU Bing;XU Lingxin;CHEN Chen;XIA Jing;ZHENG Kaitao;ZHANG Tengfei(School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan 430063,China;CCC Second Highway Consultants Co.Ltd.,Wuhan 430056,China)
出处
《武汉理工大学学报（交通科学与工程版）》
2022年第6期959-963,969,共6页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家自然科学基金(71801176)
湖北省自然科学基金(2019CFB573)。
关键词
高速公路改扩建
中央分隔带开口
自然车流
运行特征
开口长度
车辆动力学
expressway reconstruction and expansion
median opening
combined traffic flow
operating characteristics
opening length
vehicle dynamics
