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Asymptotic modal analysis and statistical energy analysis of an acoustic cavityA basic asymptotic theory for structural wall/acoustic cavity interaction is presented, and the analysis is illustrated with examples of the acoustic cavity response to a prescribed wall motion. Although, when spatially averaged, the classical modal analysis (CMA) response approaches the asymptotic modal analysis (AMA) response more rapidly as the number of modes increases, it is shown that information about local response intensification is lost in the averaging process. A larger bandwidth at a given center frequency is found to contain more excited modes than a smaller bandwidth; however, the AMA is slightly more accurate in the smaller bandwidth. All AMA asymptotes were shown to be approached from below by a CMA with fixed bandwidth and increasing center frequency.
Document ID
19880061965
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kubota, Y.
(Duke Univ. Durham, NC, United States)
Dionne, H. D.
(Duke Univ. Durham, NC, United States)
Dowell, E. H.
(Duke University Durham, NC, United States)
Date Acquired
August 13, 2013
Publication Date
July 1, 1988
Publication Information
Publication: ASME, Transactions, Journal of Vibration, Acoustics, Stress, and Reliability in Design
Volume: 110
ISSN: 0739-3717
Subject Category
Structural Mechanics
Accession Number
88A49192
Funding Number(s)
CONTRACT_GRANT: NAG1-709
Distribution Limits
Public
Copyright
Other

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