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Structural and acoustic responses of a coupled cylindrical-conical shell submerged in a heavy fluid

C. Zhang, M. Chen, X. Tao, N. Deng

Abstract


This paper studies the vibrational behavior and far-field sound radiation of a submerged coupled shell which is composed by a conical shell and a cylindrical shell at low frequencies range. The dynamic response of the coupled shell is calculated by solving the cylindrical shell equations of motion using a wave approach and the conical shell equations with a power series solution. The far-field sound pressure is solved by the element radiation superposition method. Two excitations in different directions set at the conical end are considered to discuss the structural and acoustic responses of the coupled shell. The effects of the fluid and bulkheads on the coupled shell are discussed. The results from the analytical models are validated by numerical results from a fully coupled finite element/boundary element model.

Keywords


Coupled cylindrical-conical shell, Fluid loading, bulkheads, Far-field sound pressure

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