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Multiple-mode large deflection random response of beams with nonlinear damping subjected to acoustic excitationMultiple-mode nonlinear analysis is carried out for beams subjected to acoustic excitation. Effects of both nonlinear damping and large-deflection are included in the analysis in an attempt to explain the experimental phenomena of aircraft panels excited at high sound pressure levels; that is the broadening of the strain response peaks and the increase of modal frequency. An amplitude dependent nonlinear damping model is used in the anlaysis to study the effects and interactions of multiple modes, nonlinear stiffness and nonlinear damping on the random response of beams. Mean square maximum deflection, mean square maximum strain, and spectral density function of maximum strain for simple supported and clamped beams are obtained. It is shown analytically that nonlinear damping contributes significantly to the broadening of the response peak and to the mean square deflection and strain.
Document ID
19880029334
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Prasad, C. B.
(Analytical Services and Materials, Inc. Hampton, VA, United States)
Mei, Chuh
(Old Dominion University Norfolk, VA, United States)
Date Acquired
August 13, 2013
Publication Date
October 1, 1987
Subject Category
Structural Mechanics
Report/Patent Number
AIAA PAPER 87-2712
Accession Number
88A16561
Funding Number(s)
CONTRACT_GRANT: NAS1-17993
Distribution Limits
Public
Copyright
Other

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