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Experimental identification of the radiation resistance matrix

Experimental identification of the radiation resistance matrix
Experimental identification of the radiation resistance matrix
The radiation resistance matrix allows for the calculation of structurally radiated sound power using a series of measured structural responses. Currently, estimating the radiation resistance matrix requires precise modelling of the structure which, for practical structures, can lead to estimation errors. This paper presents two methods for identifying the radiation resistance matrix for a structure using measurable structural and acoustic responses and the solution of an inverse problem. Although well suited to practical, complex structures, to allow the accuracy of the proposed methods of identifying the radiation resistance matrix to be reliably validated, they are compared with the theoretical radiation resistance matrix for a flat plate in an infinite baffle. It is shown through a simulation-based study that the accuracy of the proposed identification methods depends on the number of structural and acoustic sensors and structural forces used in the identification process. The proposed identification methods are then implemented experimentally to identify the radiation resistance matrix for a flat plate. The results demonstrate that an accurate estimate of the sound power can be obtained using the experimentally identified radiation resistance matrix using the two proposed methods, and the limits on the two methods are discussed.
0001-4966
2885-2894
Milton, Joseph
857240aa-05e9-441c-a5f3-5e21e2b7ee48
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Daley, Stephen
53cef7f1-77fa-4a4c-9745-b6a0ba4f42e6
Milton, Joseph
857240aa-05e9-441c-a5f3-5e21e2b7ee48
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Daley, Stephen
53cef7f1-77fa-4a4c-9745-b6a0ba4f42e6

Milton, Joseph, Cheer, Jordan and Daley, Stephen (2019) Experimental identification of the radiation resistance matrix. Journal of the Acoustical Society of America, 145 (5), 2885-2894. (doi:10.1121/1.5102167).

Record type: Article

Abstract

The radiation resistance matrix allows for the calculation of structurally radiated sound power using a series of measured structural responses. Currently, estimating the radiation resistance matrix requires precise modelling of the structure which, for practical structures, can lead to estimation errors. This paper presents two methods for identifying the radiation resistance matrix for a structure using measurable structural and acoustic responses and the solution of an inverse problem. Although well suited to practical, complex structures, to allow the accuracy of the proposed methods of identifying the radiation resistance matrix to be reliably validated, they are compared with the theoretical radiation resistance matrix for a flat plate in an infinite baffle. It is shown through a simulation-based study that the accuracy of the proposed identification methods depends on the number of structural and acoustic sensors and structural forces used in the identification process. The proposed identification methods are then implemented experimentally to identify the radiation resistance matrix for a flat plate. The results demonstrate that an accurate estimate of the sound power can be obtained using the experimentally identified radiation resistance matrix using the two proposed methods, and the limits on the two methods are discussed.

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Experimental ID - Accepted Manuscript
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More information

Accepted/In Press date: 24 April 2019
e-pub ahead of print date: 13 May 2019
Published date: May 2019

Identifiers

Local EPrints ID: 430454
URI: http://eprints.soton.ac.uk/id/eprint/430454
ISSN: 0001-4966
PURE UUID: 37dda557-61c0-414f-a8bb-aaa3fe875f58
ORCID for Jordan Cheer: ORCID iD orcid.org/0000-0002-0552-5506

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Date deposited: 01 May 2019 16:30
Last modified: 07 Oct 2020 04:53

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