期刊
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
卷 215, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijmecsci.2021.106962
关键词
Energy harvesting; Multimodal harvester; Multidirectional harvester; Piezoelectric; Finite element analysis; ANSYS
资金
- Brazilian Research Agency CNPq
- Brazilian Research Agency CAPES
- Brazilian Research Agency FAPERJ
The work introduces a novel star-shaped device for extracting energy from multidirectional excitation sources. Simulation results demonstrate that the device has the potential to extract energy from three-directional excitation sources with a wideband frequency spectrum.
This work deals with multidirectional and multimodal piezoelectric mechanical energy harvesters, proposing a star-shaped device composed by a tri-leg L-shaped structure with piezoelectric patches at six locations. Inertial pendular masses are strategically attached to the structure to harvest energy due to three-direction excitation sources. The device is modeled using finite element method and simulations are carried out to optimize the system design to operate in the required frequency range. System performance is investigated considering different ambient conditions including random excitations that represent the unavoidable source uncertainties. Results for in-plane and out-of-plane excitations show that the proposed device has potential to extract energy from multidirectional sources with a wideband frequency spectrum, serving as an alternative to conventional single-mode harvester with unidirectional sensitivity.
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