Shape optimization of rectangular acoustic black holes with insertion of porous materials

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F23%3A00371705" target="_blank" >RIV/68407700:21230/23:00371705 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.61782/fa.2023.0831" target="_blank" >https://doi.org/10.61782/fa.2023.0831</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.61782/fa.2023.0831" target="_blank" >10.61782/fa.2023.0831</a>

Result language
angličtina
Original language name
Shape optimization of rectangular acoustic black holes with insertion of porous materials
Original language description
The goal of this research is to enhance sound absorption in rectangular acoustic black holes (ABHs), also known as metamaterial graded absorbers, by optimizing their design using evolutionary algorithms, specifically the covariance matrix adaptation evolution strategies (CMA-ES). The designs must have good practical feasibility for 3D printing. A model based on the Riccati equation is employed to optimize the reflection coefficient of the rectangular ABH. The shape of the ABH profile is controlled by a high order Bezier curve, providing greater flexibility than simpler profiles such as polynomials. Additionally, the study explores the use of porous material and the optimization of its macroscopic geometry. Results demonstrate that the use of ABHs can significantly improve sound absorption in a frequency range below the Biot frequency of the porous material.
Czech name
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Czech description
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Project
<a href="/en/project/GA22-33896S" target="_blank" >GA22-33896S: Advanced methods of sound and elastic wave field control: acoustic black holes, metamaterials and functionally graded materials</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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