Ultrathin Underwater Sound-Absorbing Metasurface by Coupling Local Resonance with Cavity Resonance

被引：19

作者：

Feng, Jiaming ^{[1
]}

Liang, Qingxuan ^{[1
]}

Dou, Yu ^{[1
]}

He, Jingru ^{[1
]}

He, Jin ^{[1
]}

Chen, Tianning ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Mech Engn, Xian 710049, Peoples R China

来源：

PHYSICAL REVIEW APPLIED | 2022年 / 18卷 / 03期

基金：

中国国家自然科学基金;

关键词：

ACOUSTIC PERFORMANCE; STEEL PLATE; ABSORPTION; COATINGS; OPTIMIZATION; VOIDS;

D O I：

10.1103/PhysRevApplied.18.034054

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

An ultrathin underwater metasurface with low frequency, broadband, high-efficiency absorption, and high-hydrostatic-pressure-resistance performance is proposed based on the integrated principle of local resonance and cavity resonance. The design-parameter complexity is overcome by the global-optimization capability of the genetic algorithm. As a demonstration, an average sound-absorption coefficient of 92.3% at 500-10 000 Hz with an ultrathin thickness of 32 mm is achieved, including more than 99% soundabsorption coefficient at 4670-8630 Hz. In the proposed metasurface, the complex surface impedances of the three subsurfaces provide unique views for the high-efficiency sound-absorption coupling mechanism by the equivalent-circuit model. Further investigation demonstrates that the excellent property of highefficiency sound absorption is maintained under 4.5-MPa hydrostatic pressure. The proposed metasurface provides more possibilities for underwater noise suppression.

引用

页数：13