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传统的交通流模型很难同时处理交通流的“跳跃”现象和混合机动车流的交通问题.将平均车速作为状态变量,流量和大车混入率作为控制变量,可以建立尖顶突变模型的平衡曲面方程;结合交通流的物理意义,对方程进行坐标旋转和平移,并采用实测数据进行参数标定,进而得到混合机动车流的速度-流量-大车混入率模型.通过京津塘高速公路的实测数据分析表明:混合机动车流的尖顶突变模型具有较好的拟合效果,能够解释大车对混合交通流参数变化的影响,以及拥挤状态附近的突变现象,具有较好的实际应用价值.
The traditional traffic flow model is difficult to deal with the “jump” phenomenon of traffic flow and traffic flow of hybrid traffic flow at the same time.With the average speed as the state variable, the flow rate and the mixed rate of trolley as the control variables, the balance of the spire mutation model can be established Surface equation of the mixed traffic flow, the coordinate rotation and translation of the equation are combined with the physical meaning of the traffic flow, and the parameters are calibrated with the measured data to get the model of speed-flow-cart mixed rate of mixed motor flow. The data analysis shows that the spire catastrophe model of hybrid vehicle flow has a good fitting effect, which can explain the influence of the cart on the variation of mixed traffic flow parameters and the sudden phenomenon near the crowded state, and has good practical application value.