高架U型梁内吸声材料对降噪效果的影响分析

Analysis on the Effect of Sound-absorbing Material in Elevated U-shaped Beam on Noise Reduction

文章以某轨道交通工程为例,采用RAYNOISE软件对直立式、半封闭和全封闭声屏障区段,分别计算了4种工况噪声分布,着重分析了U型梁设置吸声材料对噪声分布的影响,其中全封闭声屏障的降噪量为14~20dB(A)。U型梁内敷设吸声材料可以在此基础上再提升2~5dB (A)的降噪量,敷设区域越多,降噪效果越明显,其他形式的声屏障也有同样规律。

In this paper, by taking a rail transit project as an example, the RAYNOISE software is used to calculate noise distribution under four operating modes for vertical, semi-closed and fullyenclosed noise barrier sections. This paper particularly analyzes the effect of sound-absorbing material in U-shaped beam on noise distribution. The noise reduction amount of fully-enclosed noise barrier is 14~20 dB(A), and laying sound-absorbing material in U-shaped beam can increase the noise reduction amount by 2~5 dB(A) on this basis. The more areas are laid, the more obvious the noise reduction effect is, and other forms of noise barriers have the same rule.