Evaluation of Flanking Noise Transmission within Periodically Distributed Lightweight Beam Elements

Parthkumar Gandalal Domadiya, Lars Vabbersgaard Andersen, Sergey Sorokin

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Abstract

Wooden frame structures are highly preferred as lightweight building systems nowadays. Lightweight building structures have gained more interest due to lower cost of production. However, there is a growing concern regarding noise and vibration issues within lightweight structures. Sound may pass from one room to another as indirect or flanking noise via joints or as direct transmission between adjacent rooms. The present analysis concerns flanking transmission within two-dimensional infinite periodic beam structures. The beam is comprised of two different materials placed in a periodic manner. Two different theoretical methods are taken into consideration to evaluate flanking noise transmission within the beam structure: The finite-element method (FEM) and a Floquet theory approach. Research is carried out regarding the effects of periodicity in a wide range of frequencies from 0 to 300 Hz. The nature of vibrations and flexural wave propagation is studied, and stop bands are identified at certain periodic intervals within the considered frequency range. The span of the stop bands is found to increase in size with an increase of the frequency. Results from both of the above methods are thoroughly investigated and compared. The findings of the analysis are applicable in the design of structures such as buildings, ships and aircrafts, regarding minimization of flanking noise transmission.
Original languageEnglish
Title of host publicationProceedings of the Internoise 2012/ASME NCAD meeting
Number of pages10
Place of PublicationNew York, USA
PublisherInstitute of Noise Control Engineering of the USA, Inc.
Publication date2012
Publication statusPublished - 2012
EventInter-Noise 12: Inter-Noise Congress in the USA - New York, United States
Duration: 19 Aug 201222 Aug 2012

Conference

ConferenceInter-Noise 12
CountryUnited States
CityNew York
Period19/08/201222/08/2012

Keywords

  • Noise Transmission
  • Lightweight Beam Elements
  • Beams

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