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- W897667049 abstract "Abstract A semi-analytical method is developed to predict the vibration and acoustic responses of submerged coupled spherical–cylindrical–spherical shells stiffened by circumferential rings and longitudinal stringers. The structural model of the coupled stiffened shell is formulated using a modified variational method combined with a multi-segment partitioning technique, whereas a spectral Kirchhoff–Helmholtz integral formulation is employed to model the exterior fluid. The stiffened rings and stringers, which may be few or many in number, non-uniform or uniform in size, and non-uniformly or uniformly spaced, are treated as discrete elements. The displacement and sound pressure variables are expanded in the form of a double mixed series using Fourier series and Chebyshev orthogonal polynomials. This provides a flexible way for the present method to account for the individual contributions of circumferential wave modes to the vibration and acoustic responses of coupled stiffened shells in an analytical manner. The application of the method is illustrated with several numerical examples, and comparisons are made with available solutions obtained from the coupled finite element/boundary element method. The contributions of different circumferential wave modes to the vibration responses, sound power and the directivity of radiated sound pressure for coupled shells bounded by light or heavy fluid are examined. Effects of the rings and stringers on the vibration and acoustic responses of the coupled shells are investigated." @default.
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- W897667049 date "2015-10-01" @default.
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- W897667049 title "Vibro-acoustic analysis of coupled spherical–cylindrical–spherical shells stiffened by ring and stringer reinforcements" @default.
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- W897667049 doi "https://doi.org/10.1016/j.jsv.2015.06.034" @default.
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