Title :

Lightweight sound-absorbing metastructures with perforated fish-belly panels

Author(s) :

Jin, Yabin [Auteur]
Tongji University
Yang, Yilong [Auteur]
Wen, Zhihui [Auteur]
School of Aerospace Engineering and Applied Mechanics
He, Liangshu [Auteur]
Cang, Yu [Auteur]
Tongji University
Max Planck Institute for Polymer Research
Yang, Bin [Auteur]
European Southern Observatory [ESO]
Djafari-Rouhani, Bahram [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Physique - IEMN [PHYSIQUE - IEMN]
Li, Yong [Auteur]
Li, Yan [Auteur]
Hainan University

Journal title :

International Journal of Mechanical Sciences

Pages :

107396

Publisher :

Elsevier

Publication date :

2022-07-15

ISSN :

0020-7403

HAL domain(s) :

Sciences de l'ingénieur [physics]

English abstract : [en]

We propose a perforated metastructure combining fish-belly panels and a corrugated sandwich structure for broadband sound absorption. The curved panels provide a new degree of freedom for sound absorption while the sandwich ...
Show more >We propose a perforated metastructure combining fish-belly panels and a corrugated sandwich structure for broadband sound absorption. The curved panels provide a new degree of freedom for sound absorption while the sandwich structure ensures a very good mechanical strength. We develop an effective impedance theory to study the relationship between sound absorption performance and geometric factors. To achieve a broadband absorption, we further propose a second original metastructure based on a 4-units coupling mechanism and the optimal structure is designed with the help of reinforcement learning algorithm. Finally, we define and discuss a figure of merit that reveals a global evaluation of both the acoustical and mechanical performances. Our work provides a promising platform, namely lightweight multifunctional structures for noise and load-bearing control in various industries with large-scale and inexpensive commercial manufacture technologies.Show less >

Language :

Anglais

Popular science :

Non

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL