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Article

Multimodal Local Resonators for Low-Frequency Amelioration of Acoustic Black Holes

by
Jing Zhao
1,
Zhixin Ma
1,
Yiyang Hu
1,
Jiacheng Zeng
1,
Yuxin Xu
1,
Jie Deng
1,* and
Nansha Gao
2,*
1
Key Laboratory of Ocean Acoustic and Sensing, School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China
2
Key Laboratory of Unmanned Underwater Vehicle, School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China
*
Authors to whom correspondence should be addressed.
Materials 2023, 16(13), 4579; https://doi.org/10.3390/ma16134579
Submission received: 24 April 2023 / Revised: 24 May 2023 / Accepted: 14 June 2023 / Published: 25 June 2023
(This article belongs to the Special Issue Advances in Emerging Acoustic Materials)
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Abstract

Acoustic black holes (ABHs) are effective at suppressing vibrations at high frequencies, but their performance at low frequencies is limited. This paper aims to improve the low-frequency performance of ABH plates through the design of a metamaterial acoustic black hole (MMABH) plate. The MMABH plate consists of a double-layer ABH plate with a set of periodic local resonators installed between the layers. The resonators are tuned to the low-frequency peak points of the ABH plate, which are identified using finite element analysis. To dissipate vibration energy, the beams of the resonators are covered with damping layers. A modal analysis of the MMABH plate is performed, confirming its damping effect over a wide frequency band, especially at low frequencies.
Keywords: acoustic black holes; multimodal resonators; acoustic metamaterials; vibration reduction; low frequency acoustic black holes; multimodal resonators; acoustic metamaterials; vibration reduction; low frequency

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MDPI and ACS Style

Zhao, J.; Ma, Z.; Hu, Y.; Zeng, J.; Xu, Y.; Deng, J.; Gao, N. Multimodal Local Resonators for Low-Frequency Amelioration of Acoustic Black Holes. Materials 2023, 16, 4579. https://doi.org/10.3390/ma16134579

AMA Style

Zhao J, Ma Z, Hu Y, Zeng J, Xu Y, Deng J, Gao N. Multimodal Local Resonators for Low-Frequency Amelioration of Acoustic Black Holes. Materials. 2023; 16(13):4579. https://doi.org/10.3390/ma16134579

Chicago/Turabian Style

Zhao, Jing, Zhixin Ma, Yiyang Hu, Jiacheng Zeng, Yuxin Xu, Jie Deng, and Nansha Gao. 2023. "Multimodal Local Resonators for Low-Frequency Amelioration of Acoustic Black Holes" Materials 16, no. 13: 4579. https://doi.org/10.3390/ma16134579

APA Style

Zhao, J., Ma, Z., Hu, Y., Zeng, J., Xu, Y., Deng, J., & Gao, N. (2023). Multimodal Local Resonators for Low-Frequency Amelioration of Acoustic Black Holes. Materials, 16(13), 4579. https://doi.org/10.3390/ma16134579

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