矩形截面隧道交通噪声的计算机仿真

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (8) : 33-37,4.

论文

矩形截面隧道交通噪声的计算机仿真

罗威力1,2，蔡铭1,2，刘济科1

作者信息 +

Computer simulation of traffic noise in rectangular-section tunnel

LUO Wei-li1,2, CAI Ming1,2, LIU Ji-ke1

Author information +

文章历史 +

摘要

采用计算机仿真的方法计算了三维矩形截面隧道的洞内、洞口和洞外的交通噪声。该方法结合了微观交通仿真技术、噪声排放模型、洞口和洞外传播模型，实现单点声源和动态交通源的噪声分布计算。应用虚声源法计算20阶镜面反射，还考虑直达声或反射声的一阶衍射。结果表明，隧道内点声源在洞内相对于半自由场声压增加量随距离增加而增加，而在洞外呈台阶形下降；隧道外点声源在洞内的声压级增加量随距离呈台阶形增加；动态交通流仿真中，交通流变化对洞内外声压增加量关系不大，吸声系数越大洞内外声压增加量降低越大。

Abstract

A 3D computer simulation method for rectangular-section tunnel was presented to calculate traffic noise inside and outside of tunnel. This method was composed of microscopic traffic simulation technology, traffic noise emission model and sound propagation model. Particularly, 20 times of reflections were taken into consideration by using Image Source method, and a diffraction of direct sound and reflected sound was simulated outside tunnel. The results show that, the increment of pressure level is not related to the change of traffic volume; it reduces significantly as the absorption coefficient of tunnels increases.

导出引用

罗威力;蔡铭;刘济科. 矩形截面隧道交通噪声的计算机仿真[J]. 振动与冲击, 2012, 31(8): 33-37,4

LUO Wei-li;CAI Ming;LIU Ji-ke. Computer simulation of traffic noise in rectangular-section tunnel[J]. Journal of Vibration and Shock, 2012, 31(8): 33-37,4