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  4. Vibroacoustic simulations of acoustic damping materials using a fictitious domain approach
 
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Vibroacoustic simulations of acoustic damping materials using a fictitious domain approach

Publikationstyp
Journal Article
Date Issued
2024-01-06
Sprache
English
Author(s)
Radtke, Lars  
Konstruktion und Festigkeit von Schiffen M-10  
Marter, Paul
Duvigneau, Fabian  
Eisenträger, Sascha  
Juhre, Daniel  
Düster, Alexander  
Konstruktion und Festigkeit von Schiffen M-10  
TORE-URI
https://hdl.handle.net/11420/43836
Journal
Journal of sound and vibration  
Volume
568
Article Number
118058
Citation
Journal of Sound and Vibration 568: 118058 (2023)
Publisher DOI
10.1016/j.jsv.2023.118058
Scopus ID
2-s2.0-85172482276
Publisher
Elsevier
The numerical investigation of acoustic damping materials, such as foams, constitutes a valuable enhancement to experimental testing. Typically, such materials are modeled in a homogenized way in order to reduce the computational effort and to circumvent the need for a computational mesh that resolves the complex micro-structure. However, to gain detailed insight into the acoustic behavior, e.g., the transmittance of noise, such fully resolved models are mandatory. The meshing process can still be drastically simplified by using a fictitious domain approach. We propose the finite cell method, which combines the fictitious domain approach with high-order finite elements and resolves the complex geometry using special quadrature rules. In order to take into account the fluid-filled pores of a typical damping material, a coupled vibroacoustic problem needs to be solved. To this end, we construct two separate finite cell discretizations and prescribe coupling conditions at the interface in the usual manner. The only difference to a classical boundary fitted approach to vibroacoustics is that the fluid-solid interface is immersed into the respective discretization and does not correspond to the element boundaries. The proposed enhancement of the finite cell method for vibroacoustics is verified based on a comparison with commercial software and used within an exemplary application.
Subjects
Acoustic damping materials
explicit dynamics
fictitious domain approach
monolithic coupling
vibroacoustics
DDC Class
620: Engineering
Funding(s)
Extension of fictitious domain methods for vibroacoustic problems – Analysis of heterogeneous, foamed damping materials  
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