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Date of Publication:2010-01-01

Journal:船舶力学

Affiliation of Author(s):运载工程与力学学部

Issue:8

Page Number:938-944

ISSN No.:1007-7294

Abstract:The dynamic finite element model of composite sandwich plate was established based on Zig-Zag deformation assumptions and Mindlin first order shear plate theory, three independent coordinate systems were established for upper face, down face and core respectively, angular varieties are independent each other, a more accurate finite element model was provided for dynamic analysis of sandwich plate with thick and soft cores. The sound transmission calculation model of sandwich plate embedded in an infinite plate is established by using the coupled finite element/boundary element method. The dynamic character and the sound transmission losses through sandwich plate were calculated and discussed by the computer program of the proposed model in detail, the influence of material and thickness of the core on natural frequency was considered, the influence of material and thickness of the core on sound transmission losses excited by plane sound waves and in sound diffuse field was considered in the typical examples. The numerical results reveal the dynamic and sound transmission characteristics of sandwich plates, provide a basis to improve dynamic and acoustic characteristics and have a certain guiding significance for the acoustic design of sandwich plate.

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