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- W2090115513 abstract "The circumferential admittance approach is presented to predict the vibro-acoustic behaviour of an externally fluid loaded shell with aperiodic stiffeners and transversal bulkheads. It consists to consider the circumferential spectral displacements of the shell and to use a partitioning of the structure such that the fluid loaded shell constitutes one subsystem and the stiffeners/bulkheads constitute others subsystems. Each subsystem is characterised independently by the circumferential admittances. For the stiffeners/bulkheads, a standard FE code is used to calculate these admittances with a shell description. The admittances of the fluid load shell are estimated by a spectral approach. Developments are proposed in this paper to improve the numerical convergence of the spectral approach. The final assembly is obtained using the continuity relations. Excitations like mechanical forces, acoustic diffuse fields or plane waves can be easily taken into account. For submarine applications, this model permits to study the noise radiated by the pressure hull and to analyse the acoustic target strength of the shell with its internal frames. The whole submarine pressure hull can be described with the assumption that it is extended by a cylindrical rigid baffle. Numerical validations are presented and results at several kHz are shown for a submarine application." @default.
- W2090115513 created "2016-06-24" @default.
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- W2090115513 date "2008-05-01" @default.
- W2090115513 modified "2023-09-27" @default.
- W2090115513 title "Circumferential admittance approach for vibro‐acoustic prediction of a submerged cylindrical shell with rib aperiodicity and transversal bulkheads" @default.
- W2090115513 doi "https://doi.org/10.1121/1.2932792" @default.
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