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• W2119063232 abstract "In this paper, the problem of energy harvesting with a parametric harvester is presented. A single degree-offreedom (SDOF) mechanical oscillator with time-varying stiffness subject to a harmonic base excitation is considered as a parametric harvester. A periodic time-varying stiffness is introduced to the harvester in order to generate parametric resonance. The performance of the harvester is analysed with and without the periodic stiffness coefficients. Relative displacement and the average harvested power are obtained both numerically and analytically. It is demonstrated that a small excitation can produce a large response when the system is parametrically excited with a frequency near to twice of its fundamental frequency. This enhancement of the displacement response results in an increase in the harvested energy. This response is higher when the base excitation frequency and the harvester fundamental frequency are equal. Also, it is possible to tune the parametric harvester to have parametric frequencies twice of the base excitation frequencies in order to increase the frequency bandwidth. The optimum parametric stiffness, parametric frequency and base excitation frequency are obtained to maximise the peak power." @default.
• W2119063232 created "2016-06-24" @default.
• W2119063232 creator A5053188056 @default.
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• W2119063232 date "2014-01-01" @default.
• W2119063232 modified "2023-09-24" @default.
• W2119063232 title "Mechanical modeling of a vibration energy harvester with time-varying stiffness" @default.
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