CUED Publications database

Sound radiation from point-excited structures: Comparison of plate and sphere

Choi, W and Woodhouse, J and Langley, RS (2012) Sound radiation from point-excited structures: Comparison of plate and sphere. Journal of Sound and Vibration, 331. pp. 2156-2172. ISSN 0022-460X

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Abstract

Acoustic radiation from a structure can be expressed in terms of modal radiation and modal coefficients. This paper investigates the contributions of these two modal properties to radiation excited by a point force. Sound radiation from two basic structures is considered: a baffled rectangular plate and a closed spherical shell. The plate behaviour is familiar, and governed by the relation between the natural frequency of a mode and its coincidence frequency. For a closed spherical shell, there are either zero or two critical frequencies, depending on the radius and thickness. When there are two the shell radiates well both above and below the two frequencies, and poorly in the frequency range between them. © 2012 Elsevier Ltd. All rights reserved.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div C > Applied Mechanics
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:29
Last Modified: 09 Dec 2014 05:45
DOI: 10.1016/j.jsv.2011.12.026