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ANALYTICAL SOLUTION OF RADIATION SOUND PRESSURE OF DOUBLE CYLINDRICAL SHELLS IN FLUID MEDIUM

Applied Mathematics and Mechanics(English Edition) 2002年第4期23卷 463-470页

作者：陈美霞骆东平陈小宁沈瑞喜 Faculty of Traffic Science and Engineering Huazhong University of Science and Technology Wuhan 430074 P R China System Engineering Research Institute CSSC Beijing 100036 P R China

The Donnell theory of shell was applied to describe shell motion. The inner and outer shells were stiffened by transverse components. Using deformation harmonious conditions of the interface, the effects of stiffeners were treated as reverse forces and moments on the double cylindrical shell. In the acoustic field produced by vibration and sound radiation of the double shell, the structure dynamic equation, Helmholtz equation in the fluid field and the continuity conditions of the surface of fluid-structure compose the vibration equation coupled by the sound-fluid-structure. The extract of acoustic pressure comes down to the extract of coupling vibration equation. The near field acoustic pressure can be solved directly by complicated calculational methods.

关键词： double cylindrical shell coupling vibration equation acoustic pressure

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ANALYSIS OF SOUND RADIATION FROM THE RING-STIFFENED CYLINDRICAL SHELL COATED WITH VISCOELASTIC LAYER IN FLUID MEDIUM

引用

Acta Mechanica Solida Sinica 2003年第2期16卷 155-161页

作者： Luo Dongping Cai Minbo Peng Xu Luo Bin (Department of Naval and Ocean Engineering,Huazhong University of Science and Technology,Wuhan 430074,China) Department of Naval Engineering Huazhong Univ. of Sci./Technology Wuhan 430074 China

The Donnell theory of shell is applied to describe shell motion and layer motion is described by means of three-dimensional Navier *** deformation harmonious condi- tions of the interface,the effects of stiffeners and layer are treated as reverse forces and moments acting on the cylindrical *** studying the acoustic field produced by vibration of the sub- merged ring-stiffened cylindrical coated shell,the structure dynamic equation,Helmholtz equation in the fluid field and the continuous conditions of the fluid-structure interface compose the cou- pling vibration equation of the *** extract of sound pressure comes down to the extract of coupling vibration *** use of the solution of the equation,the influ- ences of hydrostatic pressure,physical characters and geometric parameters of the layer on sound radiation are discussed.

关键词： viscoelastic layer ring-stiffened cylindrical coated shell coupling vibration equation sound radiation

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