Acoustic multi-stopband metamaterial plates design for broadband elastic wave absorption and vibration suppression

Peng, Hao; Pai, P. Frank; Deng, Haoguang

doi:10.1016/j.ijmecsci.2015.08.024

Cited by 154 publications

(41 citation statements)

References 39 publications

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“…By gaining insight in these effects, the presence of damping can then be exploited in future metamaterial designs to e.g. combine multiple stop band regions [20,28] or add specific damping treatments to or in between constituents [29], in order for these LRMs to be applicable for NVH suppression in a broader frequency range, while relying on trustworthy attenuation performance predictions.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

On the impact of damping on the dispersion curves of a locally resonant metamaterial: Modelling and experimental validation

Belle

Claeys

Deckers

et al. 2017

Journal of Sound and Vibration

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Recently, locally resonant metamaterials have come to the fore in noise and vibration control engineering, showing great potential due to their superior noise and vibration attenuation performance in targeted and tunable frequency ranges, referred to as stop bands. Damping has an important influence on the performance of these materials, broadening the frequency range of attenuation at the expense of peak attenuation. As a result, understanding and including the effects of damping is necessary to more accurately predict the attenuation performance of these locally resonant metamaterials. Classically, these often periodic structures are analysed using a unit cell modelling approach to predict wave propagation and thus stop band behaviour, discarding damping. In this work, a unit cell method including damping is used to analyse the complex dispersion curves of a locally resonant metamaterial design. The wave solutions in and around the stop band frequency range are compared to those of the unit cell method discarding damping. The influence on the dispersion curves of damping in resonator and host structure is discussed and the obtained dispersion curves are validated through an experimental dispersion curve measurement based on an Extended Inhomogeneous Wave Correlation method using Scanning Laser Doppler Vibrometry for a metamaterial plate manufactured at a representative scale. Excellent agreement is obtained between the numerically predicted and experimentally retrieved dispersion curves.

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Section: Accepted Manuscriptmentioning

confidence: 99%

On the impact of damping on the dispersion curves of a locally resonant metamaterial: Modelling and experimental validation

Belle

Claeys

Deckers

et al. 2017

Journal of Sound and Vibration

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show abstract

“…Apart from a single set of resonators, metamaterials with multiple resonators in a single unit cell were also explored by a limited number of researchers. Peng et al [36], Pai et al [37], Wang et al [38] and Zhu et al [39] developed metamaterial structures with multiple mass-spring subsystems. Huang and Sun [40] and Chen et al [41] investigated metamaterial lattice structures which contained two mass-in-mass systems in each unit.…”

Section: Introductionmentioning

confidence: 99%

Optimal design of rainbow elastic metamaterials

Meng

Chronopoulos

Fabro

et al. 2020

International Journal of Mechanical Sciences

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In this study, we present an optimization scheme for the resonator distribution in rainbow metamaterials that are constitutive of a Π-shaped beam with parallel plate insertions and two sets of spatially varying cantilever-mass resonators. To improve the vibration attenuation of the rainbow metamaterials at frequencies of interest, two optimization strategies are proposed, aiming at minimizing the maximum and average receptance values respectively. Objective functions for both single and multiple frequency ranges optimization are set up with the frequency response functions predicted by an analytical model. The masses of the two sets of resonators clamped at different side walls of the Π-shaped beams constitute the set of design variables. Optimization functions are solved out with the employment of the Genetic Algorithm method. Dedicate case studies are subsequently conducted to show the feasibility of the proposed scheme. The receptance values are found greatly reduced within the single and multiple optimization frequency ranges. Moreover, it is found that, the maximum  Corresponding author.

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“…The LRAMs are composite materials in which the basic scatterer is further designed as microlocal resonator and the bandgap can be obtained two orders of magnitude lower than that of the Bragg gaps. The in-depth studies found that the local resonance can produce exotic acoustic material characteristics such as negative effective mass density [11,[13][14][15][16][17], negative effective bulk modulus [18] or shear modulus [19,20] as well as simultaneously negative modulus and mass [21][22][23][24]. Some new concepts that exploit these special properties have emerged, including superlensing [25][26][27], cloaking [28][29][30][31][32], subwavelength imaging [33] and artificial acoustic black hole [24,34].…”

Section: Introductionmentioning

confidence: 99%

Design multi-stopband laminate acoustic metamaterials for structural-acoustic coupled system

Xiao

et al. 2019

Mechanical Systems and Signal Processing

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This paper designs the laminate acoustic metamaterials with multi-stopband for structuralacoustic coupled system. The laminate acoustic metamaterials are composed of carbon-fiberreinforced polymer (CFRP) and a periodic array of two degrees of freedom (2-DOF) massspring-damper subsystems attached to the laminate. According to the dispersion analysis, two stopbands are observed around the absorbers' resonant frequency. Based on the finite element modeling, the multi-stopband behavior has been confirmed. In addition, the effects of damping of vibration absorbers are discussed in this work. By adding the appropriate damping to the vibration absorbers, the two stop bands can be combined into a wider stopband. Subsequently, the analyses of multi-stopband laminate acoustic metamaterials in the structural-acoustic coupled system are performed. The excellent performance of multi-stopband laminate acoustic metamaterials has been applied to the front panel of vehicle, and the noise of passenger compartment cavity is reduced significantly.

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Acoustic multi-stopband metamaterial plates design for broadband elastic wave absorption and vibration suppression

Cited by 154 publications

References 39 publications

On the impact of damping on the dispersion curves of a locally resonant metamaterial: Modelling and experimental validation

On the impact of damping on the dispersion curves of a locally resonant metamaterial: Modelling and experimental validation

Optimal design of rainbow elastic metamaterials

Design multi-stopband laminate acoustic metamaterials for structural-acoustic coupled system

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