基于亥姆霍兹谐振器通风隔声结构性能研究  

A Study on the Performance of a Ventilation Sound Insulation Structure Based on the Helmholtz Resonator

作　　者：王俪静 吴晓莉[1] 徐晓美[1] WANG Lijing;WU Xiaoli;XU Xiaomei(College of Mechanical and Electronic Engineering,Nanjing Forestry University,Nanjing 210037,China)

机构地区：[1]南京林业大学机械电子工程学院,南京210037

出　　处：《建筑科学》2024年第10期171-178,共8页Building Science

基　　金：国家自然科学基金项目(51605228)。

摘　　要：近年来,随着城市绿色建筑的可持续发展,通风隔声屏障的隔声降噪性能与通风散热效果二者之间的矛盾成为一大挑战,本文提出了1种基于亥姆霍兹谐振器结构的隔声单元,旨在显著降低中低频噪声的同时能够兼顾良好的自然通风性能,打破传统隔声屏障的限制。首先由其机理出发,对结构进行设计,建立基于该结构的理论模型,通过有限元仿真,探讨其隔声降噪机理,并通过实验对隔声与通风效果进行对比验证,最后探究了结构几何参数以及通风率对隔声量的影响。研究表明,该结构在高达64%有效通风的基础上,在708 Hz频率处实现了大于50 dB的传声损失,并且在620~1600Hz频段内一直保持着20 dB以上的隔声量。在一定程度上实现了隔声降噪与绿色环保的有机结合,具有良好的应用前景与工程使用价值。In recent years,with the sustainable development of urban green buildings,the contradiction between the sound insulation and noise reduction performance of ventilation sound insulation barriers and the ventilation heat dissipation effect has become a major challenge.This paper proposed a sound insulation unit based on the Helmholtz resonator structure,aiming to significantly reduce the low frequency noise while taking into account the good natural ventilation performance and break the limitations of traditional sound insulation barriers.First,with its mechanism as a starting point,the structure was designed.A theoretical model based on the structure was built,and the sound insulation and noise reduction mechanism was discussed through finite element simulation.Moreover,the sound insulation and ventilation effects were compared and verified through experiments.Finally,it was explored how structural geometric parameters and the ventilation rate influence sound insulation.The study shows that the structure achieved a sound transmission loss of more than 50 dB at the frequency of 708 Hz,and maintained sound insulation of over 20 dB in the 620~1600 Hz frequency band on the basis of up to 64%effective ventilation.To a certain extent,it realizes the organic combination of sound insulation and noise reduction and environmental protection,with a good application prospect and value of engineering application.

关 键 词：亥姆霍兹谐振器 通风隔声 中低频 有限元 传声损失 

分 类 号：TB535[理学—物理]