Sound transmission loss calculation for metamaterial plate using combined analytical and numerical approach

• Autorzy: Chojnacka Klara , Kras Aleksander , Kamisiński Tadeusz

Identyfikatory

DOI

10.21008/j.0860-6897.2022.3.14

• Języki publikacji: EN

Abstrakty

EN

In recent years acoustic metamaterials are broadly investigated in many different fields of acoustics and one of them is noise and vibration mitigation. The solution with highest potential are locally resonant metamaterials (LRS), which by creation of band gap effect in flexural wave propagation in structure improve its Sound Transmission Loss (STL). Standard STL simulation procedures can be fully analytical or numerical. Analytical solution, when it comes to metamaterial modelling, is fast but it does not take into consideration metamaterial geometry. On the other hand numerical solution even when considering small part of periodic structure, is time consuming and can generate numerical errors related for example to the mesh. In this work combined analytical - numerical method is analysed as the alternative for STL calculation. This method can be a substitute for basic simulation procedures concerning vibro-acoustic metamaterials, since the simulations results are comparable and it is less time consuming method. Formulas and simulation procedure for the presented method are described and compared with analytical and numerical simulation results as well as with STL measurement results.

Słowa kluczowe

EN

locally resonant structures; metamaterials; sound transmission loss; simulations; diffuse field

PL

struktury miejscowo rezonujące; metamateriały; strata transmisji dźwięku; symulacje; pola rozproszone

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2022
• Tom: Vol. 33, nr 3
• Strony: art. no. 2022314
• Opis fizyczny: Bibliogr. 15 poz., il. kolor., rys., wykr.

Twórcy

autor

Chojnacka Klara

• Akademia Górniczo-Hutnicza w Krakowie, ul. A. Mickiewicza 30, 30-049 Kraków

• https://orcid.org/0000-0001-9024-2502

autor

Kras Aleksander

• Silencions Sp. z o.o., ul. Bierutowska 57-59/Budynek 5, 51-317 Wrocław

autor

Kamisiński Tadeusz

• Akademia Górniczo-Hutnicza w Krakowie, ul. A. Mickiewicza 30, 30-049 Kraków

• https://orcid.org/0000-0002-8580-2402

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).