An effective approach for topological design to the acoustic–structure interaction systems with infinite acoustic domain

2020 ◽  
Vol 62 (3) ◽  
pp. 1253-1273
Author(s):  
Wenchang Zhao ◽  
Leilei Chen ◽  
Haibo Chen ◽  
Steffen Marburg
Keyword(s):  
Acoustic Structure ◽  
Structure Interaction ◽  
Topological Design ◽  
Acoustic Domain

Generalized Mass-Redistributed Smoothed Finite Element Method (MR-SFEM) for Acoustic and Acoustic-Structural Interaction Problems

2019 ◽  
Vol 16 (04) ◽  
pp. 1850098 ◽  
Author(s):  
Y. D. Hao ◽  
G. Y. Li ◽  
X. Nie ◽  
Z. H. Hu ◽  
W. Yao
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Mass Matrix ◽  
System Matrix ◽  
Acoustic Structure ◽  
Structural Interaction ◽  
Structure Interaction ◽  
Structural Problems ◽  
Acoustic Domain ◽  
Element Method

The standard finite element method (FEM) is known for its “over-stiff” behavior, which leads to the pollution error in acoustic and acoustic-structural problems. In this paper, a generalized mass-redistributed smoothed FEM (MR-SFEM) is proposed to analyze the acoustic and acoustic-structure interaction problems. In the new MR-SFEM, the generalized mass matrix reconstitution technology is used for both the structural and acoustic discretized system based on the SFEM, which can provide a perfect balance of the discretized system matrix both in the structure and acoustic domain. The global equations of acoustic-structural interaction problems are established by coupling the MR-SFEM for the structure and for the acoustic domain. Some numerical examples of acoustic and acoustic-structure interaction problems have been used to assess the present formulation, and the results show that the present method has much better performance in terms of accuracy, convergence, and efficiency than those obtained using the standard FEM, edge-based FEM (ES-FEM), and face-based FEM (FS-FEM).

Analysis of Acoustic-Structure Interaction Using a High-Order Doubly Asymptotic Approximation

2016 ◽  
Vol 24 (01) ◽  
pp. 1550021 ◽  
Author(s):  
Heekyu Woo ◽  
Young S. Shin
Keyword(s):  
Order Approximation ◽  
Stable Model ◽  
Approximation Model ◽  
Third Order ◽  
Acoustic Structure ◽  
Structure Interaction ◽  
Proposed Model ◽  
The Stability ◽  
Third Order Approximation ◽  
Interaction Problem

In this paper, a new third-order approximation model for an acoustic-structure interaction problem is introduced. The new approximation model is designed to be an accurate and a stable model for predicting the response of a submerged structure. The proposed model is obtained by combining two lower order approximation models instead of using an operator matching method. The stability of this model is checked by a modal analysis. Finally, the approximation model is coupled to the spherical shell structure, and its performance is checked by a shock analysis.

scholarly journals Acoustic Structure Interaction with Damping Interface

2015 ◽  
Vol V4 (11) ◽  
Author(s):  
Sandeep T Varghese ◽  
Nirmal Chandran ◽  
Keyword(s):  
Acoustic Structure ◽  
Structure Interaction
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