Abstract
A relatively long circular cylindrical shell stiffened by periodically deployed stiffeners 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 stiffeners but also vibro-acoustic interactions between the structure and acoustic media have to be considered. By idealizing the system as an infinitely long cylinder subjected to a plane wave incidence, an exact solution is obtained for the first 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 stiffener spacing. Characteristics of the system responses and effects of important design parameters are studied using the transmission losses calculated from the analysis.
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