scholarly journals Efficient elasto-plastic analysis via an adaptive finite element-boundary element coupling method

2008 ◽  
Author(s):  
W. Elleithy ◽  
U. Langer
Keyword(s):  
Finite Element ◽  
Boundary Element ◽  
Coupling Method ◽  
Adaptive Finite Element ◽  
Plastic Analysis ◽  
Element Boundary

Some Recent Developments in Coupling of Finite Element and Boundary Element Methods - Part I: An Overview

2014 ◽  
Vol 580-583 ◽  
pp. 2936-2942 ◽  
Author(s):  
Wael Elleithy ◽  
Lau Teck Leong
Keyword(s):  
Finite Element ◽  
Domain Decomposition ◽  
Boundary Element ◽  
Boundary Element Methods ◽  
Coupling Method ◽  
Relaxation Parameters ◽  
Recent Developments ◽  
Optimal Dynamic ◽  
Element Boundary

Conventional and a class of domain decomposition finite element–boundary element coupling (FEM–BEM) methods are reviewed. This is Part I of two papers. In Part II, a review of the mixed Dirichlet-Neumann domain decomposition FEM-BEM coupling method is presented and optimal dynamic values of the relaxation parameters for the mixed Dirichlet-Neumann FEM-BEM coupling method are, furthermore, derived.

scholarly journals Hybrid Equivalent Circuit/Finite Element/Boundary Element Modeling for Effective Analysis of an Acoustic Transducer Array with Flexible Surrounding Structures

2021 ◽  
Vol 11 (6) ◽  
pp. 2702
Author(s):  
Min-Jung Sim ◽  
Chinsuk Hong ◽  
Weui-Bong Jeong
Keyword(s):  
Finite Element ◽  
Boundary Element ◽  
Equivalent Circuit ◽  
Acoustic Radiation ◽  
Fem Analysis ◽  
Mechanical Impedance ◽  
Coupling Method ◽  
Radiation Impedance ◽  
Element Boundary ◽  
Effective Analysis

Transducer arrays are commonly analyzed by the finite element method (FEM) with high accuracy, but it is costly, particularly when having flexible surrounding structures. In this study, we developed an equivalent circuit (EC)-based model of an array of transducers with flexible surrounding structures for effective analysis. The impedance matrix was first constructed by coupling the electrical, mechanical impedance, and the acoustic radiation impedance obtained by the EC method and finite element-boundary element (FE-BE) coupling method. The transfer matrix of far-field pressure to the transducer response was then constructed by the FE-BE coupling method, and finally the sound pressure of the external acoustic field was obtained. To verify the accuracy, the results of the proposed method were compared with those of the conventional FEM. To evaluate the efficiency of the proposed method, the reduction in the degrees of freedom (DOFs) of the proposed method from the conventional FEM analysis was investigated. The simulation results of the proposed method are highly accurate and efficient. The proposed method is expected to be useful for conceptual design.

Some Recent Developments in Coupling of Finite Element and Boundary Element Methods - Part II: Dynamic Procedures for Determining the Relaxation Parameters for the Mixed Dirichlet-Neumann Domain Decomposition FEM-BEM Coupling Method

2014 ◽  
Vol 580-583 ◽  
pp. 2943-2947
Author(s):  
Wael Elleithy ◽  
Lau Teck Leong
Keyword(s):  
Finite Element ◽  
Domain Decomposition ◽  
Boundary Element ◽  
Boundary Element Methods ◽  
Coupling Method ◽  
Dynamic Calculation ◽  
Relaxation Parameters ◽  
Coupling Methods ◽  
Recent Developments ◽  
Element Boundary

Part I of this paper presents an overview of the conventional and a class of domain decomposition finite element-boundary element coupling methods. In this part, a review of the mixed Dirichlet-Neumann domain decomposition coupling method, procedures for dynamic calculation of relaxation parameters for the mixed Dirichlet-Neumann FEM-BEM coupling method and an example application are presented.

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