Acoustic response of thin-walled, orthogonally stiffened cylinders
Acoustic response of thin-walled, orthogonally stiffened cylinders
A semi-analytical model is developed to predict the acoustic response of thinwalled, orthogonally stiffened cylinders. The free vibration model is solved by the approximate assumed-modes method. The excitation of the normal modes is considered in terms of the Joint Acceptance Function (JAF) for incident acoustic harmonic plane waves. The surface pressure distribution is obtained by the shallow shell approximation, where the blocked excitation pressure is double the incident pressure, and by the 2-D rigid cylinder approximation considering the sound scattering. The acoustic response is then compared with that of a fully coupled FE-BE model. An efficient estimation of the response can be obtained by the two models over a certain range of accuracy. Numerical results for different structural configurations are then given. The effect of the stiffeners on the modal characteristics is discussed. It also illustrates the modal contribution to the total displacement response and addresses both circumferential and axial orthogonally stiffened cylinder arrangements.
1-8
Zhao, Dong
68edf852-499c-451b-9f75-041af9dd96ed
Ferguson, Neil
8cb67e30-48e2-491c-9390-d444fa786ac8
Squicciarini, Giacomo
c1bdd1f6-a2e8-435c-a924-3e052d3d191e
Zhao, Dong
68edf852-499c-451b-9f75-041af9dd96ed
Ferguson, Neil
8cb67e30-48e2-491c-9390-d444fa786ac8
Squicciarini, Giacomo
c1bdd1f6-a2e8-435c-a924-3e052d3d191e
Zhao, Dong, Ferguson, Neil and Squicciarini, Giacomo
(2019)
Acoustic response of thin-walled, orthogonally stiffened cylinders.
IOP Conference Series: Materials Science and Engineering, 657 (1), .
(doi:10.1088/1757-899X/657/1/012007).
Abstract
A semi-analytical model is developed to predict the acoustic response of thinwalled, orthogonally stiffened cylinders. The free vibration model is solved by the approximate assumed-modes method. The excitation of the normal modes is considered in terms of the Joint Acceptance Function (JAF) for incident acoustic harmonic plane waves. The surface pressure distribution is obtained by the shallow shell approximation, where the blocked excitation pressure is double the incident pressure, and by the 2-D rigid cylinder approximation considering the sound scattering. The acoustic response is then compared with that of a fully coupled FE-BE model. An efficient estimation of the response can be obtained by the two models over a certain range of accuracy. Numerical results for different structural configurations are then given. The effect of the stiffeners on the modal characteristics is discussed. It also illustrates the modal contribution to the total displacement response and addresses both circumferential and axial orthogonally stiffened cylinder arrangements.
Text
NME1026-final
- Accepted Manuscript
Text
Zhao 2019 IOP Conf. Ser. Mater. Sci. Eng. 657 012007
- Version of Record
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Accepted/In Press date: 24 July 2019
e-pub ahead of print date: 25 October 2019
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Local EPrints ID: 434629
URI: http://eprints.soton.ac.uk/id/eprint/434629
ISSN: 1757-899X
PURE UUID: 6336a883-ab2e-44a3-9cce-27374da45c8f
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Date deposited: 04 Oct 2019 16:30
Last modified: 24 Apr 2024 04:02
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Author:
Dong Zhao
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