| 改进时空步长一维交通流的数值模拟 |
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| 引用本文： | 孟维伟,曹从咏.改进时空步长一维交通流的数值模拟[J].公路,2006(7):121-124. |
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| 作者姓名： | 孟维伟 曹从咏 |
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| 作者单位： | 南京理工大学机械工程学院,南京市,210094 |
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| 摘 要： | 在研究了现有的交通流宏观模型的基础上,采用差分方法对BD型交通流模型进行了数值模拟。为保证计算的精度和稳定性,引入“音速”概念;提出了时间和空间步长的改进算法,使得在时间步长的计算中考虑了地点平均车速和交通流密度的影响。数值模拟结果表明改进算法可行。
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| 关 键 词： | 交通流 离散格式 数值模拟 |
| 文章编号： | 0451-0712（2006）07-0121-04 |
| 收稿时间： | 2006-01-07 |
| 修稿时间： | 2006-01-07 |
Numerical Simulation of One-Dimensional Traffic Flow Upon Improved Space-Time Steps |
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| MENG Wei-wei,CAO Cong-yong.Numerical Simulation of One-Dimensional Traffic Flow Upon Improved Space-Time Steps[J].Highway,2006(7):121-124. |
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| Authors: | MENG Wei-wei CAO Cong-yong |
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| Institution: | School of Mechinary Engineering, Nanjing University of Technology, Nanjing 210094, China |
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| Abstract: | On the basis of studying the existing macroscopic model of traffic flow,difference method is applied to simulate traffic flow model of the Model BD.In order to guarantee the calculating precision and stability,"velocity" concept is introduced and improvement algorithm of time and space step proposed.The influence of place average speed and traffic flow of density are considered in time step calculation.The numerical simulation results indicate that the improvement algorithms is feasible. |
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| Keywords: | traffic flow discrete format numerical simulation |
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