윤길호
2016-09-26T07:40:17Z
2016-09-26T07:40:17Z
2015-03
JOURNAL OF COMPUTATIONAL ACOUSTICS, v. 23, NO 1, Page. 1-23
0218-396X
1793-6489
http://www.worldscientific.com/doi/10.1142/S0218396X15500022
http://hdl.handle.net/20.500.11754/23453
This research aims to develop a novel unified analysis method for an acoustic-porous-structure multiphysics interaction system when the porous medium is modeled by the empirical Delany-Bazley formulation. Multiphysics analysis of acoustic structure interaction is commonly performed by solving the linear elasticity and Helmholtz equations separately and enforcing a mutual coupling boundary condition. If the pressure attenuation from a porous material is additionally considered, the multiphysics analysis becomes highly intricate, because three different media (acoustic, porous, and elastic structures) with different governing equations and interaction boundary conditions should be properly formulated. To overcome this difficulty, this paper proposes the application of a novel mixed formulation to consider the mutual coupling effects among the acoustic, fibrous (porous), and elastic structure media. By combining the mixed finite element formulation with the Delany-Bazley formulation, a multiphysics simulation of sound propagation considering the coupling effects among the three media can be easily conducted. To show the validity of the present unified approach, several benchmark problems are considered.
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Ministry of Education, Science and Technology (NRF-2012R1A1A2A10038803).
en
WORLD SCIENTIFIC PUBL CO PTE LTD
Acoustic-porous-structure interaction
Delany-Bazley model
acoustic analysis
empirical material model
Unified Analysis with Mixed Finite Element Formulation for Acoustic-Porous-Structure Multiphysics System
Article
1
23
10.1142/S0218396X15500022
1-23
JOURNAL OF COMPUTATIONAL ACOUSTICS
Yoon, Gil Ho
2015003536
S
COLLEGE OF ENGINEERING[S]
DIVISION OF MECHANICAL ENGINEERING
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