Sound absorption of periodically cavities with gradient changes of radii and distances between cavities in a soft elastic medium

Wang, Shibo; Hu, Bo; Du, Yimei

doi:10.1016/j.apacoust.2020.107501

Cited by 29 publications

(10 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Wang et al. [233] proposed an acoustic model containing periodic cylindrical cavities incorporated in a soft elastic medium with gradient variations of distances and radii. The aim was to clarify that the high acoustic absorption in the entire frequency domain can be discovered.…”

Section: Environmental Characteristicsmentioning

confidence: 99%

Prediction of acoustic wave transmission features of the multilayered plate constructions: A review

Zarastvand

Ghassabi

Talebitooti

2021

Jnl of Sandwich Structures & Materials

View full text Add to dashboard Cite

This study collects all of the existent papers in the field of acoustic transmission across multilayered plate constructions. Herewith, a comprehensive source is proposed wherein approximately 410 references are reviewed and described from the first [Formula: see text] to [Formula: see text]. In the first part, in addition to the presentation of a complete explanation about the importance of the acoustic analysis of these structures, appropriate formulations are also provided. Furthermore, an overview of the thematic correspondent is carried out. Since the type of material used in these constructions can be very important in sound insulation, the significance of this subject is remarked. The papers are then classified based on their acoustic excitation fields containing plane wave, diffuse, random, and point source. After analyzing the research approaches according to different environmental properties, the articles are ordered based on their boundaries as finite and infinite. To present reliable outcomes, it is necessary to investigate a proper theory proportional to the structure’s thickness. Herewith, this issue is also discussed in detail. The review is also expanded to focus on the different vibroacoustic solutions. Before concluding remarks, the authors' research works are presented wherein either optimization algorithms or control techniques improve the acoustic performance of these structures.

show abstract

Section: Environmental Characteristicsmentioning

confidence: 99%

Prediction of acoustic wave transmission features of the multilayered plate constructions: A review

Zarastvand

Ghassabi

Talebitooti

2021

Jnl of Sandwich Structures & Materials

View full text Add to dashboard Cite

show abstract

“…A sound-absorbing coating is widely applied as an attachment to underwater vehicles for enhancing stealth performance. [1][2][3][4] Its typical structure consists of a rubber matrix and the inclusive cavities dissipating sound through viscoelastic loss, 5, 6 internal cavity resonance [7][8][9][10][11] and waveform conversion 12,13 to improve sound absorption. Many studies have also embedded various acoustic metamaterials in viscoelastic polymers to enhance low-frequency and broadband sound absorption through local resonance.…”

Section: Introductionmentioning

confidence: 99%

Influence of Deformation on Sound-Absorbing Performance Under Hydrostatic Pressure

Yang¹,

Zhao²,

Wang³

et al. 2022

The International Journal of Acoustics and Vibration

View full text Add to dashboard Cite

The sound-absorbing rubber coating is easy to deform under hydrostatic pressure, resulting in variation in acoustic properties. For improving the accuracy of the deformation of the sound-absorbing structure under hydrostatic pressure, four hyperelastic constitutive models of Mooney-Rivlin, Neo-Hookean, Yeoh and Arruda-Boyce were selected in fitting the tensile curve of the dumbbell specimen and the compressive curve of a cylindrical specimen. The comparison in their applicability and the accuracy showed that the Yeoh model can predict the compressive properties of carbon black filled styrene-butadiene rubber. Simulation in mechanics-sound coupling was further conducted by COMSOL software and verified by the acoustic experiments, which exhibit the non-negligible effects of pressure and tubes inserted in the cavities on the deformation and sound-absorption coefficient. Hydrostatic pressure exerts the deformation and thereafter the energy dissipation in sound transfer. Inserting a rigid tube is beneficial to improve the ability of the sound-absorbing tile to resist deformation and enhance sound absorption and dissipation. The sound absorption coefficient was above 0.4 in the frequency band above 1.5kHz even under the hydrostatic pressure of 2MPa. The numerical simulation provides one methodological reference in analyzing the influences of the structural change and the operational conditions on the sound-absorbing coating.

show abstract

“…To improve the viscoelastic dissipation performance of rubber at low frequencies, while a variety of sound-absorbing structures have been proposed, the more mature one is the cavity resonance structure [9][10][11][12][13][14] that shows cavity-related absorption peaks at low frequencies. The cavity weakens the stiffness of rubber and reduces the natural frequency of the structure.…”

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

Sound absorption of periodically cavities with gradient changes of radii and distances between cavities in a soft elastic medium

Cited by 29 publications

References 28 publications

Prediction of acoustic wave transmission features of the multilayered plate constructions: A review

Prediction of acoustic wave transmission features of the multilayered plate constructions: A review

Influence of Deformation on Sound-Absorbing Performance Under Hydrostatic Pressure

Grating‐like anechoic layer for broadband underwater sound absorption

Contact Info

Product

Resources

About