Coupling of FEM and Exterior/Interior Acoustic Field with BEM and Numerical Simulation of Vibro-Acoustic Response of Elastic Target

Author

Yang, Mingsui ; Ai, Yanting ; Xiang, Song

Author_Institution

Fluid & Acoust. Eng. Lab., Beijing Univ. of Aeronaut. & Astronaut., Beijing, China

Volume

1

fYear

2010

fDate

13-14 March 2010

Firstpage

864

Lastpage

868

Abstract

The numerical research of vibro-acoustic response to fluid-structure-fluid coupling system caused by acoustic loading needs to be conducted with the help of reliable structural finite element and acoustic boundary element to complete the fluid-structure-fluid coupling calculation. In this paper, discrete Kirchoff quadrilateral (DKQ) bending element and constant strain quadrilateral (CSQ) membrane element is adopted to construct DKQ-CSQ shell element of high accuracy. Therefore, a BEM-FEM numerical solution method of high accuracy is created. With this method, the vibro-acoustic response to the acoustic loading on a shell which is not only surrounded by but also filled with fluid can be solved. Numerical calculations of spherical shell are carried out, and the accuracy of the method is verified in this paper. The influence of different fluid media on echo intensity and structural vibration mode are analyzed in detail.

Keywords

boundary-elements methods; couplings; elasticity; finite element analysis; fluid mechanics; shells (structures); structural acoustics; vibrations; BEM; DKQ-CSQ shell element; FEM; acoustic boundary element; acoustic loading; constant strain quadrilateral membrane element; discrete Kirchoff quadrilateral bending element; echo intensity; elastic target; exterior acoustic field; fluid media; fluid-structure-fluid coupling system; interior acoustic field; numerical simulation; structural finite element; structural vibration mode; vibro-acoustic response; Acoustic scattering; Biomembranes; Finite element methods; Frequency; Geometry; Numerical simulation; Shape; Space technology; Structural shells; Underwater acoustics; BEM; FEM; acoustic scattering; fluid-structure-fluid coupling system; plane-wave; vibro-acoustic response;

fLanguage

English

Publisher

ieee

Conference_Titel

Measuring Technology and Mechatronics Automation (ICMTMA), 2010 International Conference on

Conference_Location

Changsha City

Print_ISBN

978-1-4244-5001-5

Electronic_ISBN

978-1-4244-5739-7

Type

conf

DOI

10.1109/ICMTMA.2010.534

Filename

5458762