SOUND TRANSMISSION THROUGH PERIODICALLY STIFFENED CYLINDRICAL SHELLS

✍ Scribed by J.-H. LEE; J. KIM

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 341 KB
• Volume: 251
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.2001.4009

✦ Synopsis

A relatively long circular cylindrical shell sti!ened by periodically deployed sti!eners is found in many practical applications such as the aircraft fuselage. For the sound transmission analysis of such a system, not only structural interactions between the shell and sti!eners but also vibro-acoustic interactions between the structure and acoustic media have to be considered. By idealizing the system as an in"nitely long cylinder subjected to a plane wave incidence, an exact solution is obtained for the "rst time for this type of problem. In the analysis, the solution is obtained in a series form by expanding the system responses in terms of the space harmonics of the sti!ener spacing. Characteristics of the system responses and e!ects of important design parameters are studied using the transmission losses calculated from the analysis.

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