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.

scholarly journals Coupled finite element/boundary element approach for acoustic radiation and scattering

1988 ◽  
Vol 84 (S1) ◽  
pp. S58-S58
Author(s):  
Gordon C. Everstine ◽  
Francis M. Henderson ◽  
Luise S. Schuetz
Keyword(s):  
Finite Element ◽  
Boundary Element ◽  
Acoustic Radiation ◽  
Element Approach ◽  
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.

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.

Application of the Boundary Element Method and Modal Analysis to Tire Acoustics Problems

1993 ◽  
Vol 21 (2) ◽  
pp. 66-90 ◽  
Author(s):  
Y. Nakajima ◽  
Y. Inoue ◽  
H. Ogawa
Keyword(s):  
Finite Element ◽  
Boundary Element Method ◽  
Boundary Element ◽  
Acoustic Radiation ◽  
Traffic Noise ◽  
Noise Prediction ◽  
Prediction System ◽  
Tire Noise ◽  
Acoustic Contribution ◽  
Element Method

Abstract Road traffic noise needs to be reduced, because traffic volume is increasing every year. The noise generated from a tire is becoming one of the dominant sources in the total traffic noise because the engine noise is constantly being reduced by the vehicle manufacturers. Although the acoustic intensity measurement technology has been enhanced by the recent developments in digital measurement techniques, repetitive measurements are necessary to find effective ways for noise control. Hence, a simulation method to predict generated noise is required to replace the time-consuming experiments. The boundary element method (BEM) is applied to predict the acoustic radiation caused by the vibration of a tire sidewall and a tire noise prediction system is developed. The BEM requires the geometry and the modal characteristics of a tire which are provided by an experiment or the finite element method (FEM). Since the finite element procedure is applied to the prediction of modal characteristics in a tire noise prediction system, the acoustic pressure can be predicted without any measurements. Furthermore, the acoustic contribution analysis obtained from the post-processing of the predicted results is very helpful to know where and how the design change affects the acoustic radiation. The predictability of this system is verified by measurements and the acoustic contribution analysis is applied to tire noise control.

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