{"title":"Acoustic Control in a 2D Enclosure Using Two Optimally Designed Helmholtz Resonators","authors":"P. Driesch, G. Koopmann","doi":"10.1115/imece2001/nca-23525","DOIUrl":null,"url":null,"abstract":"\n A virtual design methodology is developed to minimize the noise in enclosures when coupled to optimally designed systems of passive acoustic absorbers (Helmholtz resonators). This methodology utilizes a computationally efficient modeling technique in order to determine the modified response of a system by modal expansion of the unmodified system eigenvectors. A determination of this type (efficient model/reanalysis approach) significantly increases the design possibilities when current optimization techniques are implemented. This novel methodology is experimentally verified for a 30.5 cm by 40.6 cm by 2.5 cm 2D enclosure coupled to two optimally designed Helmholtz resonators. A 4.2 dB experimental reduction of potential energy averaged over the 300—700 Hz band was obtained.","PeriodicalId":387882,"journal":{"name":"Noise Control and Acoustics","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2001-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Noise Control and Acoustics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1115/imece2001/nca-23525","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
A virtual design methodology is developed to minimize the noise in enclosures when coupled to optimally designed systems of passive acoustic absorbers (Helmholtz resonators). This methodology utilizes a computationally efficient modeling technique in order to determine the modified response of a system by modal expansion of the unmodified system eigenvectors. A determination of this type (efficient model/reanalysis approach) significantly increases the design possibilities when current optimization techniques are implemented. This novel methodology is experimentally verified for a 30.5 cm by 40.6 cm by 2.5 cm 2D enclosure coupled to two optimally designed Helmholtz resonators. A 4.2 dB experimental reduction of potential energy averaged over the 300—700 Hz band was obtained.
开发了一种虚拟设计方法,以最大限度地减少与优化设计的被动吸声器(亥姆霍兹谐振器)系统耦合时的外壳噪声。该方法利用计算效率高的建模技术,通过对未修改系统特征向量的模态展开来确定系统的修改响应。这种类型的确定(有效的模型/再分析方法)在实施当前优化技术时显着增加了设计的可能性。该方法在一个30.5 cm × 40.6 cm × 2.5 cm的二维外壳上进行了实验验证,该外壳与两个优化设计的亥姆霍兹谐振器耦合在一起。实验结果表明,在300-700 Hz波段,平均势能降低了4.2 dB。