APPROXIMATED EVALUATION OF A RIGID ACOUSTIC CAVITY COUPLED ON A FLEXIBLE BOARD IN A FREE VIBRATION
DOI:
https://doi.org/10.26512/ripe.v2i35.21418Keywords:
Acoustic cavity rigid. Flexible plate. Approximation normal mode. Free vibrations.Abstract
The study of the acoustic behavior of a cavity depends on factors such as acoustic wavelength, cavity dimensions, the effect of flexible interface structures, making it relatively complex problem. Due to the complexity of the problem it’s sought simplified methods for the purpose techniques analysis applied with greater ease. Pretlove and Craggs (1969) presented a two-dimensional analysis of a cavity coupled to a plate using the normal mode as an approximation for explaining experimental results and then compared with results obtained by other authors. Recently Rojas (2015) presented an analytical solution to a rigid acoustic cavity coupled to a flexible plate in free vibration using an approximation by weighted residuals (Galerkin Ritz). The present study performed an analysis adding another modal forms to the Pretlove and Craggs’ works (1969) in order to evaluate the method’s efficiency. The comparisons with the Pretlove’s (1965) semi-analytical results and with the Rojas’ (2015) analytical results are the validation of this present study, checking a good approximation with the results.
Downloads
References
Ferreira, A. Comparação analítica numérica de cavidades acústicas e vibroacústicas. Dissertação de Mestrado, Universidade de Brasilia, Brasilia DF FT Departamento de Engenharia Mecânica, 2012.
Pretlove, A. J. Free vibrations of a rectangular panel backed by a closed rectangular. Journal of Sound Vibration, England, v. 3(2), p. 197 - 209, 1965.
Pretlove, A. J.; Craggs, a. A Simple Aproach To Coupled Panel-Cavity Vibrations. Journal of Sound Vibration, England, v. 11 (2), 207 - 215 1969.
Ribeiro, P. Soluções Analíticas para Cavidades Acústicas Bidimensionais com aplicação ao Estudo de Problemas de Interação Dinâmica Barragem-Reservatório.Tese de Doutorado, Universidade de Brasilia, Brasilia DF, FT Departamento de Engenharia Civil e Ambiental, 2010.
Rojas Huacanca, J. R. Solução Analítica de uma Cavidade Acústica Rígida Acoplada a uma Placa. Universidade de Brasília. Faculdade UnB Gama. Distrito Federal, p. xvi, 118 p. 2015.
Downloads
Published
How to Cite
Issue
Section
License
Given the public access policy of the journal, the use of the published texts is free, with the obligation of recognizing the original authorship and the first publication in this journal. The authors of the published contributions are entirely and exclusively responsible for their contents.
1. The authors authorize the publication of the article in this journal.
2. The authors guarantee that the contribution is original, and take full responsibility for its content in case of impugnation by third parties.
3. The authors guarantee that the contribution is not under evaluation in another journal.
4. The authors keep the copyright and convey to the journal the right of first publication, the work being licensed under a Creative Commons Attribution License-BY.
5. The authors are allowed and stimulated to publicize and distribute their work on-line after the publication in the journal.
6. The authors of the approved works authorize the journal to distribute their content, after publication, for reproduction in content indexes, virtual libraries and similars.
7. The editors reserve the right to make adjustments to the text and to adequate the article to the editorial rules of the journal.
