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Dynamic response of doubly curved honeycomb sandwich panels to random acoustic excitation. Part 2:Theoretical study

Dynamic response of doubly curved honeycomb sandwich panels to random acoustic excitation. Part 2:Theoretical study
Dynamic response of doubly curved honeycomb sandwich panels to random acoustic excitation. Part 2:Theoretical study
In this paper a single-degree-of-freedom model is developed to predict the dynamic response of an acoustially excited doubly curved sandwich panel. Three variants of the model are investigated, based on differing assumptions regarding the spatial distribution of the applied loading. When the loading is assumed to be uniform then the model reduces to the Miles approach, and when the loading is assumed to conform to the structural mode shape then the method is very similar to the Blevins approach. The third variant involves a more detailed consideration of the travelling wave characteristics of the applied loading, and this is found to give much improved agreement with experimental results obtained in a progressive wave tube facility. In addition, an approach using the finite element method is presented in which the response to grazing incidence excitation is computed, and this is also found to yield good agreement with the experimental results.
0022-460X
605-637
Cunningham, P.R.
678bb28d-d7b5-4c50-b312-0a25cec0c3f5
Langley, R.S.
3fac905f-197c-45b4-bd7c-c2df2235e279
White, R.G.
d67216d7-2691-4322-9dac-56b96add39e1
Cunningham, P.R.
678bb28d-d7b5-4c50-b312-0a25cec0c3f5
Langley, R.S.
3fac905f-197c-45b4-bd7c-c2df2235e279
White, R.G.
d67216d7-2691-4322-9dac-56b96add39e1

Cunningham, P.R., Langley, R.S. and White, R.G. (2003) Dynamic response of doubly curved honeycomb sandwich panels to random acoustic excitation. Part 2:Theoretical study. Journal of Sound and Vibration, 264 (3), 605-637.

Record type: Article

Abstract

In this paper a single-degree-of-freedom model is developed to predict the dynamic response of an acoustially excited doubly curved sandwich panel. Three variants of the model are investigated, based on differing assumptions regarding the spatial distribution of the applied loading. When the loading is assumed to be uniform then the model reduces to the Miles approach, and when the loading is assumed to conform to the structural mode shape then the method is very similar to the Blevins approach. The third variant involves a more detailed consideration of the travelling wave characteristics of the applied loading, and this is found to give much improved agreement with experimental results obtained in a progressive wave tube facility. In addition, an approach using the finite element method is presented in which the response to grazing incidence excitation is computed, and this is also found to yield good agreement with the experimental results.

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Published date: 2003

Identifiers

Local EPrints ID: 22447
URI: https://eprints.soton.ac.uk/id/eprint/22447
ISSN: 0022-460X
PURE UUID: b8f7dfd9-9110-4760-8bbf-e1976d2f879f

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Date deposited: 20 Mar 2006
Last modified: 03 Aug 2017 12:27

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Contributors

Author: P.R. Cunningham
Author: R.S. Langley
Author: R.G. White

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