Design of phononic crystals plate and application in vehicle sound insulation

Li, Lijun; Gang, Xianyue; Sun, Zhenyong; Zhang, Xianxu; Zhang, Fan

doi:10.1016/j.advengsoft.2018.08.002

Cited by 30 publications

(13 citation statements)

References 6 publications

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“…In this regard, the effects of unit cells' properties such as shapes [19,20], geometric dimensions [21,22], and material properties [23,24] on the band gap performance has been intensively investigated in a number of studies. Phononic band gaps can provide quite a versatile platform for designing wave functionalities such as mirrors [25,26], cavities [27,28], and waveguides [29,30], opening up new avenues in a variety of engineering applications, including noise control [31,32], vibration reduction [33,34], and waveguiding [35,36].…”

Section: Introductionmentioning

confidence: 99%

Double defects-induced elastic wave coupling and energy localization in a phononic crystal

Shin

Yoon

et al. 2021

Nano Convergence

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This study aims to investigate elastic wave localization that leverages defect band splitting in a phononic crystal with double defects through in-depth analysis of comparison of numerical and experimental results. When more than one defect is created inside a phononic crystal, these defects can interact with each other, resulting in a distinctive physical phenomenon from a single defect case: defect band splitting. For a phononic crystal consisting of circular-hole type unit cells in a thin aluminum plate, under A0 (the lowest antisymmetric) Lamb waves, both numerical simulations and experiments successfully confirm the defect band splitting phenomenon via frequency response functions for the out-of-plane displacement calculated/measured at the double defects within a finite distance. Furthermore, experimental visualization of in-phase and out-of-phase defect mode shapes at each frequency of the split defect bands is achieved and found to be in excellent agreement with the simulated results. Different inter-distance combinations of the double defects reveal that the degree of the defect band splitting decreases with the increasing distance due to weaker coupling between the defects. This work may shed light on engineering applications of a multiple-defect-introduced phononic crystal, including broadband energy harvesting, frequency detectors, and elastic wireless power transfer.

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Section: Introductionmentioning

confidence: 99%

Double defects-induced elastic wave coupling and energy localization in a phononic crystal

Shin

Yoon

et al. 2021

Nano Convergence

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“…A periodic arrangement of scatters can prevent the propagation of elastic waves in certain frequency ranges, thus forming OPEN ACCESS EDITED BY Yangyang Chen, Hong Kong University of Science and Technology, Hong Kong SAR, China directional or complete bandgaps. The bandgaps in PCs can be used for sound insulation and environmental noise control [3][4][5]. The propagation of acoustic and elastic waves in PCs has attracted considerable attention over the past two decades [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

A metamaterial cylindrical shell with multiple graded resonators for broadband longitudinal wave attenuation

Yao

et al. 2023

Front. Phys.

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This paper investigates a metamaterial cylindrical shell with local resonators for broadband longitudinal wave attenuation. A three-component phononic crystal metamaterial cylindrical shell that opens local resonant bandgaps at low frequencies is formed by periodically inserting a lead column coated with soft rubber into an ordinary cylindrical shell. First, the governing equations of elastic wave propagation in cylindrical shell structures are derived through coordinate transformation. Subsequently, numerical models of the metamaterial cylindrical shell are established, and the dispersion relation and vibration transmission characteristics of this structure are calculated using the Finite Element Method (FEM). Finally, in order to further broaden the bandgaps and the strong suppression range of the structure, a multiple-graded-resonator metamaterial cylindrical shell with three different local resonators is also proposed. These local resonators have different start frequencies and locations of their longitudinal wave bandgaps, so they can be combined to produce a wider overall bandgap. Numerical results show that this kind of multiple-graded-resonator metamaterial cylindrical shell has a good vibration suppression effect on longitudinal waves in the range of approximately 180–710 Hz and the vibration suppression effect can reach −40 dB at best. In addition, experimental results on vibration transmission characteristics show good agreement with the numerical results. This work provides a new idea and method for the development of acoustic metamaterials to obtain broadband and low-frequency bandgaps for cylindrical shell structures.

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“…However, compared with broadband noise reduction materials, micro-perforated plates have a narrower sound absorption frequency band, and there is limited research on its sound insulation [18][19][20][21]. Therefore, this study proposes a dual-cavity resonance composite sound-absorbing and insulating plate structure based on micro-perforated plates, and simulates its acoustic performance based on the COMSOL impedance tube model.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Sound Absorption and Insulation Performances of a Dual-Cavity Resonant Micro-Perforated Plate

Chen¹,

Guo²,

Feng³

et al. 2022

Fluid Dynamics &Amp; Materials Processing

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This study investigates a dual-cavity resonant composite sound-absorbing structure based on a micro-perforated plate. Using the COMSOL impedance tube model, the effects of various structural parameters on sound absorption and sound insulation performances are analyzed. Results show that the aperture of the micro-perforated plate has the greatest influence on the sound absorption coefficient; the smaller the aperture, the greater is this coefficient. The thickness of the resonance plate has the most significant influence on the sound insulation and resonance frequency; the greater the thickness, the wider the frequency domain in which sound insulation is obtained. In addition, the effect of filling the structural cavity with porous foam ceramics has been studied, and it has been found that the porosity and thickness of the porous material have a significant effect on the sound absorption coefficient and sound insulation, while the pore size exhibits a limited influence.

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Design of phononic crystals plate and application in vehicle sound insulation

Cited by 30 publications

References 6 publications

Double defects-induced elastic wave coupling and energy localization in a phononic crystal

Double defects-induced elastic wave coupling and energy localization in a phononic crystal

A metamaterial cylindrical shell with multiple graded resonators for broadband longitudinal wave attenuation

Optimization of Sound Absorption and Insulation Performances of a Dual-Cavity Resonant Micro-Perforated Plate

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