基于势能理论的山区公路交通流随机干扰模型

Stochastic Interference Model of Traffic Flow on Mountain Road Based on Potential Energy Theory

在对山区公路交通流随机干扰特性进行分析的基础上,研究了随机干扰对交通流的影响,利用物理学中的势能理论原理,建立了适于山区公路交通流安全分析的车辆微观分析势能模型和交通流宏观分析势能模型,并建立了基于势能理论的山区公路交通流随机干扰模型。最后,通过VISSIM仿真软件模拟短时随机干扰交通流,对建立的模型进行验证。结果表明,发生随机干扰后,路段行驶速度降低,通行能力下降,随机干扰上游交通量增大明显,发生干扰后路段交通流势能增大,发生交通事件的可能性增大。验证结果与传统交通流理论得到的分析结果基本一致,说明势能理论在山区公路交通流随机干扰特性分析方面具有一定优势。

Through studying the stochastic interference characteristics of traffic flow on mountain road, the influence of stochastic interference on traffic flow was analyzed. By using the potential energy theory, the microcosmic potential energy model and macroscopic potential energy model for the safety analysis on mountain road were established, then the stochastic interference model of mountain road based on potential energy theory was established. In the end, for verifying the models, VISSIM was used to simulate short-time traffic flow influenced by stochastic interference. The result shows that the driving speed and the capacity would reduce, the upstream traffic flow would increase obviously, the potential energy of traffic flow and the probability of traffic accident would increase after stochastic interference. The verification result is basically on the order of the analysis result by traditional traffic flow theory, which proved that the potential energy theory has the advantage in analyzing stochastic interference characteristics of traffic flow.