The stabilization effect of the density difference in the modified lattice hydrodynamic model of traffic flow

The stabilization effect of the density difference in the modified lattice hydrodynamic model of traffic flow
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修正交通流晶格水动力模型中密度差的稳定作用

DOI:
10.1016/j.physa.2012.04.027
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发表时间:
2012-10
期刊:
Physica A: Statistical Mechanics and Its Applications
影响因子:
--
通讯作者:
袁振洲
袁振洲
中科院分区:
其他
文献类型:
--
作者:
田钧方;贾斌;袁振洲

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通过引入前后格点的密度差,提出了一种改进的交通流格点流体动力学模型。通过线性稳定性分析,得到了修正模型的稳定性条件。结果表明,考虑密度差会导致系统的稳定。推导出分别描述稳定区和不稳定区密度波的Burgers方程和mKdV方程。数值模拟结果表明,考虑密度差不仅可以稳定交通流,而且使格子流体动力学模型更符合实际。
A modified lattice hydrodynamic model of traffic flow is proposed by introducing the density difference between the leading and the following lattice. The stability condition of the modified model is obtained through the linear stability analysis. The results show that considering the density difference leads to the stabilization of the system. The Burgers equation and mKdV equation are derived to describe the density waves in the stable and unstable regions respectively. Numerical simulations show that considering the density difference not only could stabilize traffic flow but also makes the lattice hydrodynamic model more realistic.
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