Bandgap merging with double-negative metabeam

Dwivedi, Ankur; Banerjee, Arnab; Adhikari, Sondipon; Bhattacharya, Bishakh

doi:10.1016/j.mechrescom.2022.103889

Cited by 11 publications

(3 citation statements)

References 25 publications

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“…However, the bandgaps are very narrower and limit its applications. Therefore, graded frequency LRs [25][26][27], nonlinear elements [28][29][30], and bandgaps merging [31][32][33][34] and tuneable technologies [35][36][37][38][39] are considered in metastructures to suppress vibration in wider, adjustable and adaptive bandgaps. Lv et al [40] designed a tuneable elastic metamaterial beam using rotatable coupled dual beam LRs, which can continuously tune the bandgap and transmission properties of the metamaterial beam by changing the moment of inertia of the resonators in a wide frequency range.…”

Section: Introductionmentioning

confidence: 99%

Aeroelastic metastructure for simultaneously suppressing wind-induced vibration and energy harvesting under wind flows and base excitations

Chen,

Xu,

Zhao

2024

Smart Mater. Struct.

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This paper proposes an innovative dual-functional aeroelastic metastructure that effectively suppresses wind-induced structural vibrations under either pure aerodynamic galloping or concurrent galloping and base excitations, while simultaneously harnessing the vibratory energy to potentially allow for self-powered onboard low-power sensing applications. Two configurations are theoretically and experimentally analysed and compared, one consisting of simply regular locally resonating masses subjected to no external forces, while the other comprising locally resonating bluff bodies which experience additional aerodynamic galloping forces. Numerical investigation is conducted based on an established aero-electro-mechanically coupled model. Wind tunnel wind tunnel and base vibration experiments are carried out using a fabricated aeroelastic metastructure prototype to characterize the energy transfer mechanisms and validate the numerical results. The mutual effects of key system parameters, including the frequency ratio, mass ratio, load resistance and electromechanical coupling strength, on the dual-functional capabilities are examined, providing a comprehensive design guideline for efficiently enhancing the energy transfer and conversion. Experimentally, the galloping displacement of the primary structure is attenuated by 78% with a measured power output of 2.63mW from a single auxiliary oscillator at a wind speed of 8m/s. This research opens new possibilities for designing novel metastructures in practical scenarios where both wind-induced vibration suppression and energy harvesting are crucial.

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Section: Introductionmentioning

confidence: 99%

Aeroelastic metastructure for simultaneously suppressing wind-induced vibration and energy harvesting under wind flows and base excitations

Chen,

Xu,

Zhao

2024

Smart Mater. Struct.

View full text Add to dashboard Cite

show abstract

“…This enables novel properties for vibration attenuation [6][7][8][9], focusing and rerouting [10,11], non-reciprocity [12], or wave amplification for energy harvesting [13][14][15]. On the topic of vibration attenuation, numerous works have shown the potential and the advantages of using local resonators [16][17][18][19][20][21]. These structures generally consist of a main waveguide, that can be 1D (a beam) 2D (a plate) or 3D (a bulk solid), inside of which are placed local resonators.…”

Section: Introductionmentioning

confidence: 99%