Flexural band gaps in periodic plates with 2D Acoustic Black Holes

Liling Tang, Li Cheng, Kean Chen

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

The Acoustics Black Hole (ABH) effect arouses increasing interests because of the huge potential in damping vibration and reducing sound radiation. Conventional structures with single ABH element usually suffer from the limitation of effective frequency since systematic broadband ABH effect can only be achieved above the characteristics frequency. Previous researches have demonstrated that periodic beams or plates with one directional ABH profiles can achieve directional flexural band gaps at quite low frequencies and thus efficiently low the effective frequency for vibration control. However, complete flexural band gaps have not been revealed among periodic 2D ABH plates due to the complex wave propagation among ABH plates, and thus hamper the low frequency application of ABH plates to some extent. In this paper, we propose a method to construct a kind of periodic plates with 2D ABH indentations. The proposed 2D ABH plates can achieve complete flexural band gaps at low frequency ranges with the combination effect of local resonances and Bragg scattering. By using only a few cells, considerable energy attenuation can be achieved within the corresponding band gaps. The proposed plates show promise for various vibration control applications, especially at low frequencies.

Original languageEnglish
Title of host publicationProceedings of 2020 International Congress on Noise Control Engineering, INTER-NOISE 2020
EditorsJin Yong Jeon
PublisherKorean Society of Noise and Vibration Engineering
ISBN (Electronic)9788994021362
Publication statusPublished - 23 Aug 2020
Event49th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2020 - Seoul, Korea, Republic of
Duration: 23 Aug 202026 Aug 2020

Publication series

NameProceedings of 2020 International Congress on Noise Control Engineering, INTER-NOISE 2020

Conference

Conference49th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2020
CountryKorea, Republic of
CitySeoul
Period23/08/2026/08/20

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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