Broadband low-frequency sound absorption of multifunctional composite metastructure  

作　　者：Yilong YANG Shanshan LIU Yan LI Tong GAO Yongdong PAN Yong LI Yabin JIN 

机构地区：[1]School of Aerospace Engineering and Applied Mechanics,Tongji University,Shanghai 200092,China [2]State International Joint Research Center of Aerospace Design and Additive Manufacturing,Northwestern Polytechnical University,Xi’an 710072,China [3]Institute of Acoustics,School of Physics Science and Engineering,Tongji University,Shanghai 200092,China [4]Shanghai Key Laboratory of Intelligent Sensing and Detection Technology,School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China [5]Shanghai Institute of Aircraft Mechanics and Control,Shanghai 200092,China

出　　处：《Science China(Technological Sciences)》2025年第2期114-124,共11页中国科学(技术科学英文版)

基　　金：supported by the National Key R&D Program of China(Grant No.2022YFB4602000);the National Natural Science Foundation of China(Grant No.12272267);the Young Elite Scientists Sponsorship Program by CAST(Grant No.2021QNRC001);Shanghai Science and Technology Committee(Grant Nos.22JC1404100,21JC1405600);the Fundamental Research Funds for the Central Universities;the Special Funds of the Tongji University for“Sino-German Cooperation 2.0 Strategy”;Shanghai Gaofeng Project for University Academic Program Development.

摘　　要：In this study,we fabricated multifunctional metastructures from carbon fiber-reinforced plastic composites using additive manufacturing technology.These metastructures are characterized by their lightweight,load-bearing capacity,and broadband low-frequency sound absorption properties.The metastructure consists of 36 unit cells,and non-local coupling mechanism was considered for designing the sound absorption performance.We developed an acoustic impedance theory tailored for the metastructure,facilitating an analysis of thermal and viscous dissipation mechanisms.It is proven theoretically and experimentally that the proposed composite metastructure can achieve a noise reduction with an average sound absorption coefficient greater than 0.9 across frequencies in the rage of 330-1500 Hz.We also studied the metastructure’s quasi-static and cyclic compression performance,confirming its efficient absorption capabilities after cyclic compression.The proposed design and additive manufacturing method for composite metastructures provides a novel pathway for creating lightweight,multifunctional structures with diverse applications,such as aerospace engineering.

关 键 词：composite metastructure broadband sound absorption additive manufacturing 

分 类 号：TB3[一般工业技术—材料科学与工程]