2D underwater acoustic metamaterials incorporating a combination of particle-filled polyurethane and spiral-based local resonance mechanisms

Zhong, Haibin; Gu, Yinghong; Bao, Bin; Wang, Q.; Wu, Jiu Hui

doi:10.1016/j.compstruct.2019.03.091

Cited by 49 publications

(13 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the rapid development of acoustic metamaterials, its unique properties are constantly being discovered and applied to many new fields, such as architectural acoustics and so on. The same year, Zhong et al [102] proposed a metamaterial sheet consisting of a particle-filled polyurethane damping material and a square lattice of a spiral resonator. Based on theoretical calculations and experimental results, they found that the average sound absorption coefficient of the proposed metamaterial board in the frequency range of 0.8-6 kHz is 0.54 at normal atmospheric pressure.…”

Section: Other Applicationsmentioning

confidence: 99%

A Review of Acoustic Metamaterials and Phononic Crystals

2020

View full text Add to dashboard Cite

As a new kind of artificial material developed in recent decades, metamaterials exhibit novel performance and the promising application potentials in the field of practical engineering compared with the natural materials. Acoustic metamaterials and phononic crystals have some extraordinary physical properties, effective negative parameters, band gaps, negative refraction, etc., extending the acoustic properties of existing materials. The special physical properties have attracted the attention of researchers, and great progress has been made in engineering applications. This article summarizes the research on acoustic metamaterials and phononic crystals in recent decades, briefly introduces some representative studies, including equivalent acoustic parameters and extraordinary characteristics of metamaterials, explains acoustic metamaterial design methods, and summarizes the technical bottlenecks and application prospects.

show abstract

Section: Other Applicationsmentioning

confidence: 99%

A Review of Acoustic Metamaterials and Phononic Crystals

2020

View full text Add to dashboard Cite

show abstract

“…They are good materials for the design of a sonic triode. The theoretical research on acoustic metamaterials currently focuses on one-dimensional structures, and their application effect research mainly focuses on two-dimensional structures [14][15][16].…”

Section: Design Of Sonic Triode Modelmentioning

confidence: 99%

“…In the process of sound wave transmission, there is a serious energy loss phenomenon [17][18][19][20]. We design the sonic triode by using the artificial periodic structure to overcome this problem, as shown in Figure 1: FOR PEER REVIEW 3 of 13 one-dimensional structures, and their application effect research mainly focuses on two-dimensional structures [14][15][16].…”

Section: Design Of Sonic Triode Modelmentioning

confidence: 99%

Research on Local Sound Field Control Technology Based on Acoustic Metamaterial Triode Structure

Yang¹,

Wu²,

Rongrong³

et al. 2020

Crystals

View full text Add to dashboard Cite

Cell photoacoustic detection faces the problem where the strength of the sound wave signal is so weak that it easily gets interfered by other acoustic signals. A sonic triode model based on an artificial periodic structure is designed by COMSOL Multiphysics 5.3a software (Stockholm, Sweden), and software simulations are conducted. Experiments show that when a sound wave with a specific frequency is input by the sound wave triode, it can produce an energy amplification effect on the sound wave signals of the same frequency and a blocking effect on the sound wave signals of other frequencies. This contrast effect is more obvious after increasing the sound pressure intensity of the input sound wave signal. It can effectively filter out interference sound signals. The study of the acoustic triode model provides a new approach for the acquisition and identification of acoustic signals in cell photoacoustic detection, which can significantly improve the working efficiency and accuracy of cell photoacoustic detection.

show abstract

“…When the frequency of incident sound is close to this natural frequency, the vibration of polymer chains in rubber is intensified, resulting in significantly increased energy dissipation via intramolecular frictions. In recent years, by periodically arranging metallic spheres or cylinders coated with soft materials in a host polymer matrix, locally resonant anechoic layers have been widely investigated 15‐21 . When the frequency of a sound wave approaches the natural frequency of local resonators, the latter force the polymer chains to vibrate violently, thus achieving strong sound absorption 16 .…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, by periodically arranging metallic spheres or cylinders coated with soft materials in a host polymer matrix, locally resonant anechoic layers have been widely investigated. [15][16][17][18][19][20][21] When the frequency of a sound wave approaches the natural frequency of local resonators, the latter force the polymer chains to vibrate violently, thus achieving strong sound absorption. 16 In recent years, the development of metamaterials/metasurfaces has led to new vitality to the design of underwater anechoic layers.…”

Section: Introductionmentioning

confidence: 99%

Grating‐like anechoic layer for broadband underwater sound absorption

Duan

et al. 2022

Int Journal of Mech Sys Dyn

View full text Add to dashboard Cite

To address the challenging task of effective sound absorption in the low and broad frequency band for underwater structures, we propose a novel grating-like anechoic layer by filling rubber blocks and an air backing layer into metallic grating. The metallic gratings are incorporated into the anechoic layer as a skeleton for enhanced viscoelastic dissipation by promoting shear deformation between rubber and metal plates. The introduction of an air backing layer releases the bottom constraint of the rubber, thus intensifying its deformation under acoustic excitation. Based on the homogenization method and the transfer matrix method, a theoretical model is developed to evaluate the sound absorption performance of the proposed anechoic layer, which is validated against finite element simulation results. It is demonstrated that a sound absorption coefficient of the grating-like anechoic layer of 0.8 can be achieved in the frequency range of 1294-10 000 Hz. Given the importance of sound absorption at varying frequencies, the weighted average method is subsequently used to comprehensively evaluate the performance of the anechoic layer. Then, with structural density taken into consideration, an integrated index is proposed to further evaluate the acoustic properties of the proposed anechoic layer. Finally, the backing conditions and the boundary conditions of finite-size structures are discussed. The results provide helpful theoretical guidance for designing novel acoustic metamaterials with broadband low-frequency underwater sound absorption.

show abstract

2D underwater acoustic metamaterials incorporating a combination of particle-filled polyurethane and spiral-based local resonance mechanisms

Cited by 49 publications

References 31 publications

A Review of Acoustic Metamaterials and Phononic Crystals

A Review of Acoustic Metamaterials and Phononic Crystals

Research on Local Sound Field Control Technology Based on Acoustic Metamaterial Triode Structure

Grating‐like anechoic layer for broadband underwater sound absorption

Contact Info

Product

Resources

About