Coupling finite element and boundary element methods for the analysis of the acoustic scattering by elastic structures

1992 ◽  
Vol 92 (4) ◽  
pp. 2473-2473 ◽  
Author(s):  
Antoine Lavie ◽  
Bertrand Dubus
Keyword(s):  
Finite Element ◽  
Boundary Element ◽  
Acoustic Scattering ◽  
Boundary Element Methods ◽  
Elastic Structures

Coupled Finite Element/Boundary Element Method for the Analysis of the Acoustic Scattering From Elastic Structures

1995 ◽  
Author(s):  
Bertrand Dubus ◽  
Antoine Lavie ◽  
Dominique Decultot ◽  
Gérard Maze
Keyword(s):  
Finite Element ◽  
Boundary Element ◽  
Acoustic Waves ◽  
Acoustic Scattering ◽  
Resonant Mode ◽  
Mode Shapes ◽  
Thin Cylindrical Shell ◽  
Isolation And Identification ◽  
Fluid Medium ◽  
Physical Phenomena

Abstract Considerable interest has been expressed recently in the scattering of acoustic waves from elastic targets. For structures of arbitrary shapes, the numerical method relying upon a finite element description of the solid part and a boundary element description of the waves propagating in the infinite fluid medium is the most commonly used. This paper presents a coupling between the ATILA finite element code and the EQI boundary element code performed using a solid variable methodology. Results are presented for a thin cylindrical shell bounded by hemispherical endcaps which are insonified at axial and normal incidences. Comparisons are made with measurements of backscattered pressure spectra and angular patterns obtained with the quasi-harmonic MIIR (Method of Isolation and Identification of Resonances). Emphasis is put on post-processing techniques contributing to the interpretation of physical phenomena such as the extraction of resonant mode shapes.

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