Reduction of sound transmission into a circular cylindrical shell using distributed vibration absorbers and Helmholtz resonators

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dc.contributorVirginia Tech. Department of Mechanical Engineering. Vibration and Acoustics Laboratoriesen
dc.contributor.authorEsteve, Simon J.en
dc.contributor.authorJohnson, Martin E.en
dc.contributor.departmentMechanical Engineeringen
dc.date.accessed2015-05-12en
dc.date.accessioned2015-05-27T19:50:21Zen
dc.date.available2015-05-27T19:50:21Zen
dc.date.issued2002-12-01en
dc.description.abstractA modal expansion method is used to model a cylindrical enclosure excited by an external plane wave. A set of distributed vibration absorbers (DVAs) and Helmholtz resonators (HRs) are applied to the structure to control the interior acoustic levels. Using an impedance matching method, the structure, the acoustic cavity, and the noise reduction devices are fully coupled to yield an analytical formulation of the structural kinetic energy and acoustic potential energy of a treated cylindrical cavity. Lightweight DVAs and small HRs tuned to the natural frequencies of the targeted structural and acoustic modes, respectively, result in significant acoustic and structural attenuation when the devices are optimally damped. Simulations show that significant interior noise reduction can only be achieved by adding damping to both structural and acoustic modes, which are resonant in the frequency bandwidth of interest. In order to be independent of the azimuth angle of the excitation and to avoid unwanted modal interactions, the devices are distributed evenly around the cylinder in rings. This treatment can only achieve good performance if the structure and the acoustic cavity are lightly damped.en
dc.description.sponsorshipVibro-Acoustic Sciences, Inc. (San Diego)en
dc.description.sponsorshipFuller Technologiesen
dc.format.extent9 pagesen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationEsteve, S. J., & Johnson, M. E. (2002). Reduction of sound transmission into a circular cylindrical shell using distributed vibration absorbers and Helmholtz resonators. Journal of the Acoustical Society of America, 112(6), 2840-2848. doi: 10.1121/1.1514933en
dc.identifier.doihttps://doi.org/10.1121/1.1514933en
dc.identifier.issn0001-4966en
dc.identifier.urihttp://hdl.handle.net/10919/52669en
dc.identifier.urlhttp://scitation.aip.org/content/asa/journal/jasa/112/6/10.1121/1.1514933en
dc.language.isoen_USen
dc.publisherAcoustical Society of Americaen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectAcoustic cavitationen
dc.subjectAcoustic noiseen
dc.subjectAcoustic resonanceen
dc.subjectAcoustic modelingen
dc.subjectAcoustic transmissionen
dc.titleReduction of sound transmission into a circular cylindrical shell using distributed vibration absorbers and Helmholtz resonatorsen
dc.title.serialJournal of the Acoustical Society of Americaen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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