Rainbow trapping is a phenomenon that enables vibration confinement due to the gradual variation of the wave velocity in space, which is typically achieved by means of locally resonant unit cells. In the context of electromechanical metastructures for energy harvesting, this strategy is employed to improve mechanical-to-electrical energy conversion and thereby to maximize the harvested power. In contrast to structures endowed with either mechanical or electromechanical resonators, we investigate a hybrid configuration that leverages the synergistic interplay between them. We compare numerical results for different grading laws in comparison to prior efforts on the topic, demonstrating enhanced energy harvesting and wideband vibration attenuation capabilities of the hybrid metastructure. We also discuss the formation of grading-induced localized modes and we shed light on the role of the motion of individual resonators on the overall power output increase.
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14 August 2022
Research Article|
August 09 2022
Harnessing rainbow trapping via hybrid electromechanical metastructures for enhanced energy harvesting and vibration attenuation Available to Purchase
Jonatha Santini
;
Jonatha Santini
(Conceptualization, Formal analysis, Investigation, Methodology, Writing – original draft, Writing – review and editing)
1
Department of Mechanical Engineering, Politecnico di Milano
, Via La Masa 1, Milano 20156, Italy
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Christopher Sugino
;
Christopher Sugino
(Conceptualization, Formal analysis, Investigation, Supervision, Writing – original draft, Writing – review and editing)
2
Department of Mechanical Engineering, Stevens Institute of Technology
, Hoboken, New Jersey 07030, USA
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Emanuele Riva
;
Emanuele Riva
a)
(Conceptualization, Formal analysis, Investigation, Supervision, Writing – original draft, Writing – review and editing)
1
Department of Mechanical Engineering, Politecnico di Milano
, Via La Masa 1, Milano 20156, Italy
a)Author to whom correspondence should be addressed: [email protected]
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Alper Erturk
Alper Erturk
(Conceptualization, Formal analysis, Investigation, Methodology, Supervision, Writing – original draft, Writing – review and editing)
3
George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology
, Atlanta, Georgia 30332, USA
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Jonatha Santini
1
Christopher Sugino
2
Emanuele Riva
1,a)
Alper Erturk
3
1
Department of Mechanical Engineering, Politecnico di Milano
, Via La Masa 1, Milano 20156, Italy
2
Department of Mechanical Engineering, Stevens Institute of Technology
, Hoboken, New Jersey 07030, USA
3
George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology
, Atlanta, Georgia 30332, USA
a)Author to whom correspondence should be addressed: [email protected]
J. Appl. Phys. 132, 064903 (2022)
Article history
Received:
March 04 2022
Accepted:
July 17 2022
Citation
Jonatha Santini, Christopher Sugino, Emanuele Riva, Alper Erturk; Harnessing rainbow trapping via hybrid electromechanical metastructures for enhanced energy harvesting and vibration attenuation. J. Appl. Phys. 14 August 2022; 132 (6): 064903. https://doi.org/10.1063/5.0090258
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