| Related citation: | Junqiang Leng,Shi An,Wenxiang Li,Weiyi Liu,Hantao Zhao.Car-following Model and Its Stability under Ice and Snowfall Conditions[J].Journal of Harbin Institute Of Technology(New Series),2017,24(1):91-96.DOI:10.11916/j.issn.1005-9113.16020. |
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| Author Name | Affiliation | | Junqiang Leng | School of Automotive Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, Shandong, China | | Shi An | School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150090, China | | Wenxiang Li | Key Laboratory of Road and Traffic Engineering, Ministry of Education,Shanghai 201804, China | | Weiyi Liu | School of Automotive Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, Shandong, China | | Hantao Zhao | School of Automotive Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, Shandong, China |
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| Abstract: |
| In order to describe the behavior of the car under ice and snowfall conditions more realistically, a vehicle following model based on the full velocity difference model is proposed under the premise of considering the speed difference and various kinds of ice and snowfall conditions. Under various road conditions, it obtains the critical stability curve of the model, and verifies that the worse the road condition is, the less stable the traffic flow is. In addition, the method of nonlinear analysis is used to obtain the solution of the kink density wave in the space headway under the unstable region. Finally, the conclusions are verified by numerical simulation, that worse road conditions, which means the road surface friction coefficient is small, will lead to greater instability region and worse anti-interference ability of traffic flow, and even cause more congestion and accidents. The conclusions make great contributions to handling the traffic jams and security issues under ice and snowfall conditions. |
| Key words: car-following model ice and snowfall conditions stability |
| DOI：10.11916/j.issn.1005-9113.16020 |
| Clc Number:U491.1 |
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| Descriptions in Chinese: |
| 冰雪条件下车辆跟驰模型及稳定性 冷军强1* , 安 实2, 李文翔3, 刘维怡1, 赵韩涛1 (1.哈尔滨工业大学（威海），汽车工程学院，威海 264209，山东; 2.哈尔滨工业大学 交通科学与工程学院，哈尔滨 150006； 3.道路与交通工程教育部重点实验室，上海 201804) 摘要：为研究冰雪条件下车辆的跟驰规律及稳定性，基于全速度差(FVD)模型，提出一种考虑不同道路条件的交通流跟驰模型。通过线性稳定性分析，得到各种道路条件下模型的临界稳定曲线，道路条件越恶劣，交通流的稳定区域越小。通过非线性分析获得不稳定区域下的扭结-反扭结密度波。最后使用数值仿真技术，模拟验证本文结论：道路条件越差，即路面摩擦系数越小，交通流稳定性越差，遇小扰动时越容易发生拥堵甚至事故。该结论对解决冰雪条件下交通拥堵与安全问题有重要意义。 关键词：车辆跟驰模型;冰雪条件; 稳定性 创新点说明：本文基于全速度差模型构建了一能够应用于不同道路条件下的交通流跟驰模型，并利用该模型对冰雪条件下交通流进行了稳定性分析。 |
