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耦合共振型进气消声器声学特性分析
引用本文:虞涵仁,文桂林,陈志夫,王艳广.耦合共振型进气消声器声学特性分析[J].工程设计学报,2012,19(4):289-293.
作者姓名:虞涵仁  文桂林  陈志夫  王艳广
作者单位:湖南大学汽车车身先进设计制造国家重点实验室,湖南大学航天技术研究所
基金项目:教育部长江学者与创新团队发展计划项目(531105050037);湖南大学汽车车身先进设计制造国家重点实验室自主课题项目(61075003)
摘    要: 为了拓宽消声频带、提高消声量,克服传统串并联腔体结构安装空间大等缺点,研究了一种新型耦合共振型进气消声器.利用一维平面波理论探究了Helmholtz消声器的消声机理;为准确模拟消声器突变结构处的高阶次声波,建立了并联共振腔结构和新型结构Helmholtz消声器的声学有限元计算模型;计算、分析、比较了各结构的消声特性,重点研究了新型结构尺寸参数对其共振频率与传递损失的影响.计算结果表明:由于腔体间空气耦合共振作用,两腔耦合共振型Helmholtz消声器具有3个共振频率;两共振腔连接管的长度与直径是影响该结构消声性能的关键尺寸,减小连接管长度或者增大直径都可以拓宽消声器的消声频带,提高消声性能.这将为主动、被动耦合共振型进气消声器的设计提供重要参考.

关 键 词:Helmholtz消声器  传递损失  有限元分析  声学特性

Analysis of acoustical characteristics of coupled intake resonators
YU Han-ren,WEN Gui-lin,CHEN Zhi-fu,WANG Yan-guang.Analysis of acoustical characteristics of coupled intake resonators[J].Journal of Engineering Design,2012,19(4):289-293.
Authors:YU Han-ren  WEN Gui-lin  CHEN Zhi-fu  WANG Yan-guang
Affiliation:(State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Institute of Space Technology,Hunan University,Changsha 410082,China)
Abstract:The traditional parallel and serial connected resonator are applied to control the intake noise,there are a number of drawbacks,such as its feature of small transmission loss,narrow frequency bandwidth and big mounting space.The acoustic characteristic of new coupled resonator was analyzed for this problem.The acoustic attenuation mechanism of standard Helmholtz resonator was studied by using one dimensional plan wave approach;three dimensional acoustical finite element models of parallel and coupled connected resonators were established for capturing the evanescent high order modes at area with sudden change;acoustic attenuation performance of the two models was computed,analyzed and compared.the influence of different size parameters on resonance frequency and transmission loss of Helmholtz resonator were especially analyzed.The results show that two coupled resonators could result in triple transmission loss peaks because of resonance between two coupled cavities.The length and diameter of connecting pipe between two cavities are the key dimensions for impacting the effect of acoustical performance,and the attenuation bandwidth can be broadened by reducing the length or increasing the diameter of connecting pipe.Hence,this will provide an important reference for design active and passive coupled resonator.
Keywords:Helmholtz resonator  transmission loss  finite element analysis  acoustical performance
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