Structural Properties of the Stability of Jamitons

Structural Properties of the Stability of Jamitons
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Jamitons 稳定性的结构特性

DOI:
10.1007/978-3-030-66560-9_3
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发表时间:
2020
期刊:
Macro and Kinetic Models. SEMA SIMAI Springer Series
影响因子:
--
通讯作者:
Seibold, B.
Seibold, B.
中科院分区:
--
文献类型:
--
作者:
Ramadan, R. A.;Rosales, R. R.;Seibold, B.

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已知非齐次二阶宏观交通模型可以再现幻堵车现象:每当违反亚特征条件时,均匀交通流是不稳定的,小的扰动成长为非线性行波,称为jamitons。相比之下,本质上尚未研究的问题是:哪些jamiton解是动态稳定的?要了解通过模型的动态可以产生哪些走走停停的交通波,这个问题是至关重要的。本文首先提出了一个计算研究,证明了哪些类型的jamitons是动态产生的,哪些不是。然后,提出了一种表征jamitons稳定性的方法。研究表明,这种分析的一个关键组成部分是对冲击的扰动和声点的邻域的适当处理。
It is known that inhomogeneous second-order macroscopic traffic models can reproduce the phantom traffic jam phenomenon: whenever the sub-characteristic condition is violated, uniform traffic flow is unstable, and small perturbations grow into nonlinear traveling waves, called jamitons. In contrast, what is essentially unstudied is the question: which jamiton solutions are dynamically stable? To understand which stop-and-go traffic waves can arise through the dynamics of the model, this question is critical. This paper first presents a computational study demonstrating which types of jamitons do arise dynamically, and which do not. Then, a procedure is presented that characterizes the stability of jamitons. The study reveals that a critical component of this analysis is the proper treatment of the perturbations to the shocks, and of the neighborhood of the sonic points.
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