Design of a local resonator using topology optimization to tailor bandgaps in plate structures

Jung, Jaesoon; Goo, Seongyeol; Kook, Junghwan

doi:10.1016/j.matdes.2020.108627

Cited by 25 publications

(20 citation statements)

References 49 publications

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“…However, in the acoustic metamaterial research domain, the utilization of these techniques is at the initial stage. Numerous works have been reported in the acoustic metamaterial field [120][121][122][123][124][125][126][127][128]. Recently, Bianco et al [129] discussed the recent advances and transformative potential of machine learning (ML), including deep learning, in the field of acoustics.…”

Section: Discussionmentioning

confidence: 99%

Recent Advances in Acoustic Metamaterials for Simultaneous Sound Attenuation and Air Ventilation Performances

Kumar¹,

Lee²

2020

Crystals

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In the past two decades, acoustic metamaterials have garnered much attention owing to their unique functional characteristics, which are difficult to find in naturally available materials. The acoustic metamaterials have demonstrated excellent acoustical characteristics that paved a new pathway for researchers to develop effective solutions for a wide variety of multifunctional applications, such as low-frequency sound attenuation, sound wave manipulation, energy harvesting, acoustic focusing, acoustic cloaking, biomedical acoustics, and topological acoustics. This review provides an update on the acoustic metamaterials’ recent progress for simultaneous sound attenuation and air ventilation performances. Several variants of acoustic metamaterials, such as locally resonant structures, space-coiling, holey and labyrinthine metamaterials, and Fano resonant materials, are discussed briefly. Finally, the current challenges and future outlook in this emerging field are discussed as well.

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Section: Discussionmentioning

confidence: 99%

Recent Advances in Acoustic Metamaterials for Simultaneous Sound Attenuation and Air Ventilation Performances

Kumar¹,

Lee²

2020

Crystals

View full text Add to dashboard Cite

show abstract

“…However, in the acoustic metamaterial research domain, the utilization of these techniques is at the initial stage. Numerous works have been reported in the acoustic metamaterial field [119][120][121][122][123][124][125][126][127]. Recently, Bianco et al [128] has discussed the recent advances and transformative potential of machine learning (ML), including deep learning, in the field of acoustics.…”

Section: Discussionmentioning

confidence: 99%

Recent Advances in Acoustic Metamaterials for Simultaneous Sound Attenuation and Air Ventilation Performances

Kumar¹,

Lee²

2020

Preprint

View full text Add to dashboard Cite

In the past two decades, acoustic metamaterials have garnered much attention owing to their unique functional characteristics, which is difficult to be found in naturally available materials. The acoustic metamaterials have demonstrated to exhibit excellent acoustical characteristics that paved a new pathway for researchers to develop effective solutions for a wide variety of multifunctional applications such as low-frequency sound attenuation, sound wave manipulation, energy harvesting, acoustic focusing, acoustic cloaking, biomedical acoustics, and topological acoustics. This review provides an update on the acoustic metamaterials' recent progress for simultaneous sound attenuation and air ventilation performances. Several variants of acoustic metamaterials, such as locally resonant structures, space-coiling, holey and labyrinthine metamaterials, and Fano resonant materials, are discussed briefly. Finally, the current challenges and future outlook in this emerging field is discussed as well.

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“…However, an anti-resonance-based design method generally requires relatively expensive computational resources to analyze the entire periodic structure. Using the stopband analysis, the response of the entire structure can be determined by the numerical analysis for the unit-cell structure [9][10][11][12][13]. According to Bloch's theorem, the response of a multi-celled structure consisting of a periodically repeated unit cell is expressed as the product of a periodic function and a plane wave [10].…”

Section: Introductionmentioning

confidence: 99%

“…Using the stopband analysis, the response of the entire structure can be determined by the numerical analysis for the unit-cell structure [9][10][11][12][13]. According to Bloch's theorem, the response of a multi-celled structure consisting of a periodically repeated unit cell is expressed as the product of a periodic function and a plane wave [10]. Using the Floquet-Bloch boundary condition based on the Bloch theorem, each boundary of the unit cell structure is characterized by a wave vector.…”

Section: Introductionmentioning

confidence: 99%

“…Stopband analysis is an iterative eigenvalue analysis of periodic boundary conditions determined by each wave vector. Using stopband analysis of the unit-cell structure, a stopband in which no vibration mode exists for all wave vectors can be calculated, and the vibration is not propagated within the frequency range of the stopband [9][10][11]14].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Numerical and Experimental Study on an Interconnected Metamaterial for Flexural Vibration Control Based on Modal Strain Energy

2021

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In this study, an interconnected metamaterial was proposed to suppress flexural vibration. The interconnected metamaterial can improve the manufacturing and installation processes in terms of convenience because it can be fabricated in the form of a modular multi-celled structure with a single-phase material. To evaluate the vibration reduction performance of the metamaterial, stopband analysis was performed, as it solves an iterative eigenvalue problem for the wave vector domain. In order to identify the Bloch mode that contributes to flexural vibration, a concept to extract the Bloch mode based on the modal strain energy was proposed. The vibration-reduction performance of the interconnected metamaterial was numerically verified by using a frequency-response analysis of the multi-celled structure. The interconnected metamaterial proposed in this study was fabricated by using a 3D printer. Finally, the vibration-reduction performance of the multi-celled structure was experimentally verified by using impact testing.

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Design of a local resonator using topology optimization to tailor bandgaps in plate structures

Cited by 25 publications

References 49 publications

Recent Advances in Acoustic Metamaterials for Simultaneous Sound Attenuation and Air Ventilation Performances

Recent Advances in Acoustic Metamaterials for Simultaneous Sound Attenuation and Air Ventilation Performances

Recent Advances in Acoustic Metamaterials for Simultaneous Sound Attenuation and Air Ventilation Performances

A Numerical and Experimental Study on an Interconnected Metamaterial for Flexural Vibration Control Based on Modal Strain Energy

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