交通流噪声分析的流体力学特征线算法

Characteristic Line Computation of Flow Mechanics for Traffic Flow Noise

把车流模拟为流动的线噪声源 ,利用流体动力学理论建立交通流模型 .提出的特征线算法解决了差分数值格式对初始条件和畅流速度等的制约 ,以及信号灯控制下的流场分布和噪声预报问题 .计算结果与有关实测数据的对比表明本文方法是准确可靠的 .

The running automobiles on the roads are modeled as the sources of flow line noise and the traffic flow noise is researched based on flow dynamic theory. The method of characteristic line is presented to study the flow field, forecast the flow noise under the control of signal lamp and overcome shortcomings of differential approach that are constrained by initial condition and unblocked velocity. It is shown that the presenting approach is accurate by comparing the computational results with measured data. This paper presents a new method for sound environment plan and cities forecast.