经典局域共振型水声超材料的吸隔声性能研究  

Sound absorption and insulation properties of underwater acoustic metamaterials based on classical local resonance

作　　者：葛丽丽 彭子龙[1] 柴鹏程 程一鹏 黄唯纯 GE Lili;PENG Zilong;CHAI Pengcheng;CHENG Yipeng;HUANG Weichun(Institute of Vibration and Noise,Jiangsu University of Science and Technology,Zhenjiang 212100,China;School of Modern Engineering and Applied Sciences,State Key Laboratory of Solid Microstructure Physics,Nanjing University,Nanjing 210093,China)

机构地区：[1]江苏科技大学振动噪声研究所,镇江212100 [2]南京大学,固体微结构物理国家重点实验室,现代工程与应用科学学院,南京210093

出　　处：《应用声学》2022年第6期1004-1009,共6页Journal of Applied Acoustics

基　　金：江苏省自然科学青年基金项目(BK20200995);国防科技基础加强计划技术领域基金项目(2020-JCJQ-JJ-228)。

摘　　要：基于传统水声材料结构复杂以及吸声频段窄等相关缺点,该文提出了一种局域共振型水声超材料,通过有限元建立水声超材料模型,分析该结构吸声性能影响因素。此外为了验证钢背衬的隔声性能,在该水声超材料结构基础上添加一层0.005 m厚的钢背衬进行仿真对比。研究结果表明,在频段为600-4000 Hz时,水声超材料声学性能较好,吸声性能整体较优,且添加钢背衬的水声超材料隔声性能较优,甚至在某频率点达到13 dB的隔声差值。此外通过位移场图进一步揭示水声超材料的吸声机理,发现水声超材料结构的位移场和钢背衬都对吸声性能会产生影响:钢背衬通过共振增强结构整体的位移大小,不仅显著提高结构的隔声性能而且还增强结构的吸声性能;而位移场则通过位移幅度影响吸声性能,位移幅度越大,结构的吸声性能越好。Based on the complex structure and narrow sound absorption band of traditional underwater acoustic materials,a local resonance underwater acoustic metamaterial is proposed in this paper.The underwater acoustic metamaterial model is established by finite element method,and the influencing factors of the sound absorption performance of the structure are analyzed.In addition,in order to verify the sound insulation performance of steel backing,A layer of 0.005 m thick steel backing is added to the underwater acoustic metamaterial structure for simulation comparison.The results show that when the frequency band is 600–4000 Hz,the acoustic performance of underwater acoustic metamaterials is better,the sound absorption performance is better as a whole,and the sound insulation performance of underwater acoustic metamaterials with steel backing is better,even reaching a sound insulation difference of 13 dB at a certain frequency point In addition,the sound absorption mechanism of underwater acoustic metamaterial is further revealed through the displacement field diagram.It is found on the sound absorption performance.The steel backing enhances the overall displacement of the that the displacement field of underwater acoustic metamaterial structure and steel backing will have an impact on the sound absorption performance.The steel backing enhances the overall displacement of the structure through resonance,which not only significantly improves the sound insulation performance of the structure,but also enhances the sound absorption performance of the structure,while the displacement field affects the sound absorption performance through the displacement amplitude,the larger the displacement amplitude,the better the sound absorption performance of the structure.

关 键 词：水声超材料 吸隔声性能 局域共振 

分 类 号：O429[理学—声学]