Page 107 - 《应用声学》2020年第6期

第 39 卷 第 6 期 Vol. 39, No. 6
2020 年 11 月 Journal of Applied Acoustics November, 2020

⋄ 研究报告 ⋄

平行声屏障的陷波模态及其插入损失优化

郭文成 † 叶 璇

(中国建筑西南设计研究院有限公司 成都 610041)

摘要：为了改善平行声屏障的性能，该文基于有限元仿真的方法对其陷波模态和插入损失进行了研究。其中，
陷波模态是平行声屏障的固有性质，与其几何参数有关。当陷波模态处于共振频率时，平行声屏障内部声场的
声能量达到峰值，同时声波垂直入射到声屏障的顶端，使声影区的衍射声能也达到峰值，最终导致插入损失显
著下降。该文还对 3 种优化平行声屏障插入损失的方法进行了分析。结果表明，楔形和扩散型声屏障可降低
声波的多次反射效应对插入损失的影响，但是对陷波模态的改善较小；而吸声型声屏障有效地抑制了陷波模
态对插入损失的不利影响，从而改善了平行声屏障的性能。
关键词：平行声屏障；陷波模态；有限元仿真
中图法分类号: TU112 文献标识码: A 文章编号: 1000-310X(2020)06-0901-06
DOI: 10.11684/j.issn.1000-310X.2020.06.013

Wave-trapping modes and the optimization of the insertion losses of

parallel noise barriers

GUO Wencheng YE Xuan

(China Southwest Architecture Design and Research Institute Co., Ltd., Chengdu 610041, China)

Abstract: The wave-trapping modes and insertion losses of parallel noise barrier are investigated in this paper,
aiming to improve the performance of it. The wave-trapping modes are the inherent properties of parallel noise
barrier and determined by the geometrical configuration of barriers. The sound energy within the parallel
barrier will be highest when the wave-trapping modes are in resonance. In the meantime, the energy flux
impinges normally on the top of the barrier, results in a peak diffractions in the shadow zone and remarkable
drops of insertion losses. Three optimization methods are analyzed in this paper as well. The results indicate
that the wedge and diffuser structures that mounted on the inner surface of the barrier can reduce the negative
influences of multiple reflections, but have little improvements on wave-trapping modes. While, the negative
influence of the wave-trapping modes on the insertion losses is effectively confined by the absorptive barrier,
hence improving the performance of parallel noise barrier.
Keywords: Parallel noise barrier; Wave-trapping modes; Finite element modeling

2020-01-01 收稿; 2020-09-11 定稿
作者简介: 郭文成 (1990– ), 男, 四川资阳人, 硕士, 研究方向: 环境声学与建筑声学。
† 通信作者 E-mail: wencheng@seu.edu.cn