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Record Details

Record 59 of 14005
A finite element model for sound transmission through panels
Author and Affiliation:
Ramakrishnan, J. V.(Missouri Univ., Rolla, MO, United States)
Koval, L. R.(Missouri-Rolla, University, Rolla, MO, United States)
Abstract: A finite element method (FEM) is applied to predicting coupled frequencies and pressures within an acoustic cavity in order to characterize sound transmission through a panel. Structural equations of motion are defined and the FEM model is configured with four-noded plate elements, the lateral displacement and two slopes being the unknowns at every node. Each element then has 12 degrees of freedom (DOF) and the displacement variation is expressed by a 12-term nonconforming polynomial. A consistent mass matrix is used to represent the panel mass matrix and a wave equation governs the acoustic volume. Analysis of pressure and displacement over the panel yields a square coupling matrix, and an eigenanalysis leads to a solution of the forced vibration problem.
Publication Date: Jan 01, 1983
Document ID:
19840066341
(Acquired Nov 28, 1995)
Accession Number: 84A49128
Subject Category: ACOUSTICS
Document Type: Conference Paper
Publication Information: SEE A84-49102 24-31
Publisher Information: United States
Contract/Grant/Task Num: NAG1-240
Financial Sponsor: NASA; United States
Organization Source: Missouri Univ.; Rolla, MO, United States
Description: 4p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: FINITE ELEMENT METHOD; MATHEMATICAL MODELS; PANELS; SOUND TRANSMISSION; VIBRATION MODE; AUDIO FREQUENCIES; DEGREES OF FREEDOM; EQUATIONS OF MOTION; FORCED VIBRATION; VOLUME; WAVE EQUATIONS
Imprint And Other Notes: IN: Developments in mechanics. Volume 12 - Midwestern Mechanics Conference, 18th, Iowa City, IA, May 16-18, 1983, Proceedings (A84-49102 24-31). Iowa City, IA, University of Iowa, 1983, p. 529-532.
Availability Source: Other Sources
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