Abstract:

The noise of the viaduct of city metros brings obvious influence on the environment, to which has been paid more attention. The structure-borne noise has the characteristics of low frequency, large radiation area and long distance propagation, it is quite difficult to mitigate. In this paper, the measurement and analysis of the vibration and noise of the viaduct of Guangzhou metro line 4 was implemented, Tuned Mass Damper (TMD) to control the structure-borne noise was developed and applied on the viaduct of Guangzhou metro line 4. The noise measurement showed, after the installation of TMD, at the control frequency band of 80Hz, the noise reduction is 9.3-12.4dBA, the reduction effect for ten times pass-by noise is 2.1dBA.

摘要：

城市轨道高架桥梁产生的噪声对周围环境的影响十分明显，日益受到人们的关注。过车时轨道高架桥梁振动辐射产生的结构噪声具有频率低，辐射面积大，传播距离远的特性，治理难度很大。本文对广州地铁4号线高架桥振动噪声进行了测试与分析，研制了调谐质量阻尼器对轨道高架桥梁的结构噪声进行控制。测试结果表明， 桥梁安装TMD后桥下1.5米测点在80Hz控制频带降低9.3-12.4dBA，10次过车降噪效果平均值为2.1dBA。

关键词: 振动与波；振动控制；调谐质量阻尼器, 轨道高架桥梁