Simultaneous energy harvesting and vibration control in a nonlinear metastructure: A spectro-spatial analysis

Considerable attention has recently been given to the study of simultaneous energy harvesting and vibration attenuation in metastructures. However, only linear metastructures were investigated although nonlinear metastructures and nonlinear electromechanical devices offer superior interesting wave p...

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Bibliographic Details
Published inJournal of sound and vibration Vol. 473; p. 115215
Main Authors Bukhari, Mohammad, Barry, Oumar
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier Ltd 12.05.2020
Elsevier Science Ltd
Subjects
Acoustic propagation
Acoustics diode
Attenuation
Broadband
Computer simulation
Electromechanical devices
Energy gap
Energy harvesting
Multiscale analysis
Nonlinear analysis
Nonlinear control
Nonlinear metamaterial
Nonlinear systems
Numerical integration
Propagation
Resonators
Solitary waves
Spatial analysis
Spectro-spatial analysis
Vibration
Vibration analysis
Vibration control
Voltage distortion
Wave propagation
Nonlinear metamaterial
Spectro-spatial analysis
Acoustics diode
Energy harvesting
Solitary waves
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Summary:Considerable attention has recently been given to the study of simultaneous energy harvesting and vibration attenuation in metastructures. However, only linear metastructures were investigated although nonlinear metastructures and nonlinear electromechanical devices offer superior interesting wave propagation phenomena (e.g., birth of solitary waves, tunable bandgap, acoustic nonreciprocity) and broadband energy harvesting. In this paper, we investigate the wave propagation in a weakly nonlinear metastructure with electromechanical resonators. Explicit expressions are derived for the nonlinear dispersion relations using the method of multiple scales. These expressions are validated via direct numerical integration. We carried out parametric studies to investigate the role of different parameters of the electromechanical resonators on the linear and nonlinear band structure. To obtain further detailed information on the nonlinear wave propagation, we employ spectro-spatial analysis on the numerical simulations. This spectro-spatial analysis can reveal the output voltage distortion due to different types of nonlinearities. The results indicate that nonlinear chain can enhance energy harvesting through the birth of solitary wave and without degrading the boundary of the bandgap. The results also suggest that such a system is suitable for designing electromechanical diodes and rectifiers.
ISSN:0022-460X
1095-8568
DOI:10.1016/j.jsv.2020.115215