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Sound transmission through a double-panel construction lined with poroelastic material in the presence of mean flow

Sound transmission through a double-panel construction lined with poroelastic material in the presence of mean flow
Sound transmission through a double-panel construction lined with poroelastic material in the presence of mean flow
This paper investigates the sound transmission characteristics through a system of double-panel lined with poroelastic material in the core. The panels are surrounded by external and internal fluid media where a uniform external mean flow exists on one side. Biot's theory is used to model the porous material. Three types of constructions—bonded–bonded, bonded–unbonded and unbonded–unbonded—are considered. The effect of Mach number of the external flow on the sound transmission over a wide frequency range in a diffuse sound field is examined. External mean flow is shown to give a modest increase in transmission loss at low frequency, but a significant increase at high frequency. It is brought out that calculations based on static air on the incidence side provide a conservative estimate of sound transmission through the sandwich structure. The acoustic performance of the sandwich panel for different configurations is presented. The effect of curvature of the panel is also brought out by using shallow shell theory
0022-460X
3724-3734
Zhou, J.
ea4ca5fc-7c95-4b68-824a-b16792fee77a
Bhaskar, A.
d4122e7c-5bf3-415f-9846-5b0fed645f3e
Zhang, X.
3056a795-80f7-4bbd-9c75-ecbc93085421
Zhou, J.
ea4ca5fc-7c95-4b68-824a-b16792fee77a
Bhaskar, A.
d4122e7c-5bf3-415f-9846-5b0fed645f3e
Zhang, X.
3056a795-80f7-4bbd-9c75-ecbc93085421

Zhou, J., Bhaskar, A. and Zhang, X. (2013) Sound transmission through a double-panel construction lined with poroelastic material in the presence of mean flow. Journal of Sound and Vibration, 332 (16), 3724-3734. (doi:10.1016/j.jsv.2013.02.020).

Record type: Article

Abstract

This paper investigates the sound transmission characteristics through a system of double-panel lined with poroelastic material in the core. The panels are surrounded by external and internal fluid media where a uniform external mean flow exists on one side. Biot's theory is used to model the porous material. Three types of constructions—bonded–bonded, bonded–unbonded and unbonded–unbonded—are considered. The effect of Mach number of the external flow on the sound transmission over a wide frequency range in a diffuse sound field is examined. External mean flow is shown to give a modest increase in transmission loss at low frequency, but a significant increase at high frequency. It is brought out that calculations based on static air on the incidence side provide a conservative estimate of sound transmission through the sandwich structure. The acoustic performance of the sandwich panel for different configurations is presented. The effect of curvature of the panel is also brought out by using shallow shell theory

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More information

Accepted/In Press date: 18 February 2013
Published date: 21 March 2013
Organisations: Aerodynamics & Flight Mechanics Group

Identifiers

Local EPrints ID: 350470
URI: http://eprints.soton.ac.uk/id/eprint/350470
ISSN: 0022-460X
PURE UUID: 73a475b6-2882-4abf-adee-8455486b0103

Catalogue record

Date deposited: 04 Apr 2013 11:14
Last modified: 08 Nov 2021 23:45

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Contributors

Author: J. Zhou
Author: A. Bhaskar
Author: X. Zhang

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