A Design of Mechanical Frequency Converter Linear and Non-linear Spring Combination for Energy Harvesting

In this study, the improvement of energy harvesting from wideband vibration with random change by using a combination of linear and nonlinear spring system is investigated. The system consists of curved beam spring for non-linear buckling, which supports the linear mass-spring resonator. Applying sh...

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Bibliographic Details
Published in:Journal of physics. Conference series 2014-01, Vol.557 (1), p.12065-5
Main Authors: Yamamoto, K, Fujita, T, Badel, A, mosa, F, Kanda, K, Maenaka, K
Format: Article
Language:English
Subjects:
Acceleration
Buckling
Computer simulation
Curved beams
Energy harvesting
Finite element method
Frequency converters
Mathematical models
Matlab
Nonlinearity
Physics
Resonant frequencies
Resonators
Springs (elastic)
Time response
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Summary:In this study, the improvement of energy harvesting from wideband vibration with random change by using a combination of linear and nonlinear spring system is investigated. The system consists of curved beam spring for non-linear buckling, which supports the linear mass-spring resonator. Applying shock acceleration generates a snap through action to the buckling spring. From the FEM analysis, we showed that the snap through acceleration from the buckling action has no relationship with the applied shock amplitude and duration. We use this uniform acceleration as an impulse shock source for the linear resonator. It is easy to obtain the maximum shock response from the uniform snap through acceleration by using a shock response spectrum (SRS) analysis method. At first we investigated the relationship between the snap-through behaviour and an initial curved deflection. Then a time response result for non-linear springs with snap through and minimum force that makes a buckling behaviour were obtained by FEM analysis. By obtaining the optimum SRS frequency for linear resonator, we decided its resonant frequency with the MATLAB simulator.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/557/1/012065