Bifurcation analysis based on new macro two-velocity difference model. (English) Zbl 07851031
Summary: Based on the new macroscopic two-velocity difference model, this paper analyzes the linear stability of the new model and studies the nonlinear bifurcation theory. First, the linear stability analysis method is used to study the stability conditions of the shock wave in the model. Then, considering the long wave model in the coarse-grained scale, the reduced perturbation method is used to analyze the characteristics of the traffic flow in the metastable region, and the solitary wave solution of the Korteweg-de Vries (KdV) equation in the metastable region is derived. In addition, by using the bifurcation analysis method, the type, and stability of the equilibrium solution are discussed and the existing conditions of the saddle-node bifurcation are proven. Then, taking the saddle-node bifurcation as the starting point, we draw the density space-time diagram and phase plane diagram of the system. It is proven that the newly proposed model can describe complex traffic phenomena such as stop-and-go and sudden changes in stability, which is of great help to solve traffic congestion.
MSC:
| 34K18 | Bifurcation theory of functional-differential equations |
| 35Q53 | KdV equations (Korteweg-de Vries equations) |
| 35B32 | Bifurcations in context of PDEs |
| 76L05 | Shock waves and blast waves in fluid mechanics |
| 76A30 | Traffic and pedestrian flow models |
| 76M10 | Finite element methods applied to problems in fluid mechanics |
Keywords:
bifurcation analysis; nonlinear traffic phenomenon; shock wave; saddle-node bifurcation; stop-and-go traffic phenomenaReferences:
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