Deep-subwavelength and hydrostatic-pressure-resistant meta-absorber for broadband low-frequency underwater sound

Yanni Zhang; Manlin Tong; Xiaoting Rui; Guoping Wang; Fufeng Yang

doi:10.35848/1882-0786/ad622e

Applied Physics Express (Jan 2024)

Deep-subwavelength and hydrostatic-pressure-resistant meta-absorber for broadband low-frequency underwater sound

Yanni Zhang,
Manlin Tong,
Xiaoting Rui,
Guoping Wang,
Fufeng Yang

Affiliations

Yanni Zhang: ORCiD; Institute of Launch Dynamics, Nanjing University of Science and Technology , Nanjing, Jiangsu, People’s Republic of China; National key Laboratory of Complex Multibody System Dynamics, People’s Republic of China
Manlin Tong: Institute of Launch Dynamics, Nanjing University of Science and Technology , Nanjing, Jiangsu, People’s Republic of China; National key Laboratory of Complex Multibody System Dynamics, People’s Republic of China
Xiaoting Rui: Institute of Launch Dynamics, Nanjing University of Science and Technology , Nanjing, Jiangsu, People’s Republic of China; National key Laboratory of Complex Multibody System Dynamics, People’s Republic of China
Guoping Wang: Institute of Launch Dynamics, Nanjing University of Science and Technology , Nanjing, Jiangsu, People’s Republic of China; National key Laboratory of Complex Multibody System Dynamics, People’s Republic of China
Fufeng Yang: Institute of Launch Dynamics, Nanjing University of Science and Technology , Nanjing, Jiangsu, People’s Republic of China; National key Laboratory of Complex Multibody System Dynamics, People’s Republic of China

DOI: https://doi.org/10.35848/1882-0786/ad622e
Journal volume & issue: Vol. 17, no. 7
p. 077001

Abstract

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By embedding center-supported graded-circular-plates (CS-GCPs) into an elastomer, a deep-subwavelength and hydrostatic-pressure-resistant meta-absorber was designed and manufactured for sound absorption (SA) under hydrostatic pressure. The meta-absorber exhibits excellent SAs (>0.842, 0.927 on average) within 500–2000 Hz and quasi-perfect SAs (>0.94) within 500–700 Hz with a 2% thickness of the sound wavelength. The excellent SAs (0.91 on average) are verified experimentally within 1–10 kHz, and remained high (0.84 on average) under a hydrostatic pressure of 1.0 MPa. The exotic functionality arises from enriched local-dynamics by the CS-GCPs and pressure-resistance of the center-support, providing an effective solution for ultra-broadband low-frequency underwater sound control.

Published in Applied Physics Express

ISSN: 1882-0778 (Print); 1882-0786 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Science: Physics
Website: https://iopscience.iop.org/journal/1882-0786

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