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

被引：1
|
作者：
Zhang, Yanni [1 ,2 ]
Tong, Manlin [1 ,2 ]
Rui, Xiaoting [1 ,2 ]
Wang, Guoping [1 ,2 ]
Yang, Fufeng [1 ,2 ]
机构：
[1] Nanjing Univ Sci & Technol, Inst Launch Dynam, Nanjing, Jiangsu, Peoples R China
[2] Natl Key Lab Complex Multibody Syst Dynam, Nanjing, Peoples R China
来源：
APPLIED PHYSICS EXPRESS | 2024年 / 17卷 / 07期
基金：
中国国家自然科学基金;
关键词：
underwater acoustic absorbers; hydrostatic pressure; broadband low-frequency sound; subwavelength; ACOUSTIC METAMATERIALS; ABSORPTION; OPTIMIZATION;
D O I：
10.35848/1882-0786/ad622e
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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. (c) 2024 The Author(s). Published on behalf of TheJapan Society of Applied Physics by IOP Publishing Ltd.
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页数：6
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