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ANALYSIS OF STRUCTURAL ACOUSTIC COUPLING OF A CYLINDRICAL SHELL WITH AN INTERNAL FLOOR PARTITION

✍ Scribed by D.S. LI; L. CHENG; C.M. GOSSELIN

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
294 KB
Volume
250
Category
Article
ISSN
0022-460X

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✦ Synopsis

In the present paper the structural acoustic coupling characteristics of a cylindrical shell with an internal #oor partition are analyzed. Due to the existence of the #oor, the cavity becomes irregular and both the structural and acoustic modes are di$cult to express analytically. A method using &&Radiation E$ciency Analysis of Structural Modes'' is proposed. Typical con"gurations ranging from plain shells to shells with #oor partitions are analyzed and, whenever possible, results are compared with those found in the literature. This method is shown to be e!ective when irregular-shaped cavities are involved. Meanwhile, analyses using wavenumber spectrum are also employed as an alternative. Results show that both methods have their own merit and both are very useful in the analysis of structural acoustic coupling systems, especially in the case of irregular cavities.

2002 Elsevier Science Ltd.

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