TY - GEN
T1 - Flexural band gaps in periodic plates with 2D Acoustic Black Holes
AU - Tang, Liling
AU - Cheng, Li
AU - Chen, Kean
N1 - Funding Information:
The authors would like to thank the financial support from the National Science Foundation of China (No. 11902260, No.11532006, No. 11974287), Fundamental Research Funds for the Central Universities (No. 3102019HHZY03001), and Research Grant Council of the Hong Kong SAR (PolyU 152017/17E).
Publisher Copyright:
© Proceedings of 2020 International Congress on Noise Control Engineering, INTER-NOISE 2020. All rights reserved.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2020/8/23
Y1 - 2020/8/23
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85101349135&partnerID=8YFLogxK
M3 - Conference article published in proceeding or book
AN - SCOPUS:85101349135
T3 - Proceedings of 2020 International Congress on Noise Control Engineering, INTER-NOISE 2020
SP - 5267
EP - 5275
BT - Proceedings of 2020 International Congress on Noise Control Engineering, INTER-NOISE 2020
A2 - Jeon, Jin Yong
PB - Korean Society of Noise and Vibration Engineering
T2 - 49th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2020
Y2 - 23 August 2020 through 26 August 2020
ER -