Authors: Karličić, Danilo 
Cajić, Milan 
Adhikari, Sondipon
Affiliations: Mathematical Institute of the Serbian Academy of Sciences and Arts 
Title: Dual-mass electromagnetic energy harvesting from galloping oscillations and base excitation
Journal: Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
Issue Date: 1-Jan-2020
Rank: M23
ISSN: 0954-4062
DOI: 10.1177/0954406220948910
This paper investigates electromagnetic energy harvesting based on vibration energy extraction from the vibration of a bluff body elastically connected with an additional nonlinear oscillator and subjected to fluid flow and base excitation. The mechanical part is modeled as a system of two coupled oscillators where a combination of harmonic base excitation and fluid forces leads to a steady-state regime. The electromagnetic generator as part of the harvesting device is represented by the equivalent electrical circuit with power dissipated at an electrical load resistance. The mathematical model is based on a set of two coupled nonlinear ordinary differential equations considering the transverse displacement of a bluff body, additional nonlinear oscillator, and currents induced in the electromagnetic generator. By introducing the incremental harmonic balance and continuation methods nonlinear periodic responses are investigated and complex dynamic behavior presented through corresponding response diagrams. The results indicate that for some values of system parameters multiple periodic solutions appear in the form of loops and hysteresis. Finally, the average power of proposed energy harvester is given in time history diagrams for different values of nonlinear stiffness parameter and velocity of fluid flow.
Keywords: continuation technique | dual mass | energy harvester | Fluid induced vibration | incremental harmonic balance method | periodic response
Publisher: SAGE Journals
Project: Dynamics of hybrid systems with complex structures. Mechanics of materials. 

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