交通流双车动力学模型与数值仿真

考虑双前车信息对跟驰车辆的影响,建立了改进的新的微观双车跟车模型。在此基础上,按照交通流研究中采用的微观-宏观参量关联关系,推导出改进的宏观交通流双车动力学模型。通过模型稳定性分析得到了该模型线性稳定的判别条件。数值仿真表明该模型能够模拟交通流的堵塞和疏导等实际交通流现象,以及次邻近前车对交通流波动性存在不可忽视的影响。

Traffic Flow Two Cars Dynamic Model and Numerical Simulation

With the consideration of effect of the two front vehicles information to the following car, a new microscopic two cars car-following model was improved. Based on the above microscopic two cars car-following model, an improved macroscopic traffic flow two cars dynamic model was deduced by the relevancy relation of microscopic and macroscopic scale parameter for the traffic flow. According to stability analyzing model, the linear stable judging condition was obtained to the model. Numerical simulation indicates that the proposed model can simulate traffic flow jam and leading true phenomena. And there is unavoidable effect of traffic flow wave from the hypo-vicinity order front vehicle.