Broadband vibration attenuation from a one‐dimensional acoustic black hole resonator for plate‐on‐plate structures

Souza, Marcos R.; Fabro, Adriano Todorovic; Lenzi, Arcanjo

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Campo DC	Valor	Idioma
dc.contributor.author	Souza, Marcos R.	-
dc.contributor.author	Fabro, Adriano Todorovic	-
dc.contributor.author	Lenzi, Arcanjo	-
dc.date.accessioned	2021-09-13T20:54:09Z	-
dc.date.available	2021-09-13T20:54:09Z	-
dc.date.issued	2021	-
dc.identifier.citation	SOUZA, Marcos R.; FABRO, Adriano Todorovic; LENZI, Arcanjo. Broadband vibration attenuation from a one‐dimensional acoustic black hole resonator for plate‐on‐plate structures. Journal of the Brazilian Society of Mechanical Sciences and Engineering, v. 43, n. 442, 2021. DOI: 10.1007/s40430-021-03162-7. Disponível em: https://link.springer.com/article/10.1007/s40430-021-03162-7. Acesso em: 13 set. 2021.	pt_BR
dc.identifier.uri	https://repositorio.unb.br/handle/10482/42093	-
dc.language.iso	Inglês	pt_BR
dc.publisher	Springer Nature	pt_BR
dc.rights	Acesso Restrito	pt_BR
dc.title	Broadband vibration attenuation from a one‐dimensional acoustic black hole resonator for plate‐on‐plate structures	pt_BR
dc.type	Artigo	pt_BR
dc.subject.keyword	Mobilidade	pt_BR
dc.subject.keyword	Buraco negro	pt_BR
dc.subject.keyword	Ressonadores	pt_BR
dc.subject.keyword	Método dos elementos finitos	pt_BR
dc.subject.keyword	Vibração - controle	pt_BR
dc.rights.license	© 2021 Springer Nature Switzerland AG. Part of Springer Nature.	pt_BR
dc.identifier.doi	https://doi.org/10.1007/s40430-021-03162-7	pt_BR
dc.description.abstract1	This paper investigates the vibrational behaviour and attenuation performance of a plate connected to a plate-like resonator equipped with a 1D acoustic black hole. The ABH principle relies on trapping the incident waves and consequently absorbing the incoming mechanical energy. Conversely, the ABH acts as a conventional dynamic absorber in which the vibration modes of the wedge act as a multifrequency resonator when attached to a host structure. The typically added damping layer enriches its dynamic, providing superior attenuation across a broader frequency band. This plate-like resonator can be used as a vibration control alternative to the use of single or multiple resonators attached to the host structure. In this work, a mobility-based approach is used to connect both the host plate and the plate-like resonator with an ABH termination. The response of both structures is given by a Finite Element model implemented by the authors in MATLAB, and the point connections are assumed to be rigid. The results are compared to that of a uniform plate acting as a multifrequency resonator, and it is shown that the ABH-based vibration attenuation leads to a reduction of up to 20 dB across multiple third-octave bands in the mobility response of the coupled system. Additionally, the energy flow is also investigated, and it is shown that the ABH-plate resonator yields up to 50 dB reduction also over multiple third-octave bands in the spatially averaged kinetic energy spectra. The addition of the film of viscoelastic material enhances its attenuation performance by up to 30 dB compared to the geometric effect due to the ABHs. The results suggest that this ABH-based solution can be a viable engineering approach and opens the way for new and innovative solutions in vibration control.	pt_BR
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