COMPUTATIONAL EVALUATION OF DAMPING AND DECOUPLING MATEIRALS - PHASE 2

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Authors
  1. Foin, O.
  2. Berry, A.
  3. Nicholas, J.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Sherbrooke Univ, Sherbrooke QUE (CAN) Dept of Mechanical Engineering
Abstract
The present report ends the second year of a contract between the Defence Research Establishment Atlantic (DREA/CRDA) and the Acoustics and Vibrations Group of University of Sherbrooke (GAUS) (contract: HAL 95-00760-(107), "Computational Evaluation of Damping and Decoupling Materials"). The work consists of three tasks: (i) The improvement of a computer code for the prediction of sound radiation from a plane structure including decoupling/damping surface treatments; (ii) A theoretical study of the sound radiation from a plane structure into a cavity containing a dense fluid; the purpose of this study is to explore the possibility of predicting the performance of decoupling/damping treatments in free field from experimental measurements of the sound radiation into a cavity; (iii) The third part of this report suggests simple vibratory indicators in order to qualify the acoustic performance of decoupling/damping treatments in free field. Parametric and optimization studies are conducted on the basis of these indicators to provide the main tendencies of the vibroacoustics of such systems.
Keywords
Vibro-acoustics;Fluid structure interaction;Decoupling
Report Number
DREA-CR-97-423 — Contractor Report
Date of publication
01 May 1997
Number of Pages
65
DSTKIM No
97-04147
CANDIS No
505774
Format(s):
Hardcopy;Document Image stored on Optical Disk

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