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- W3200820844 abstract "This study examined the feasibility of harvesting mechanical energy from vibrating structures using the direct piezoelectric effect of a bimorph cantilever beam with integrated piezoceramic elements. A harvester consisting of a cantilever tapered beam, two bonded piezoelectric ceramics and two masses at its end was investigated with particular reference to the effect of harvester geometry on electromechanical performance. This paper summarized the material properties of each element and presented numerical simulations to demonstrate the increase in performances when using a tapered beam harvester instead of constant cross section harvester. Three case studies were presented, including a standard rectangular harvester, an equivalent mass/stiffness tapered beam harvester and an equivalent maximal strain tapered beam harvester. They all had a first short circuit natural frequency of 100 Hz. In order to evaluate model quality and the results accuracy, the harvester structure was modeled using finite element with NxNastran 5. The study showed that the efficiency of a cantilever beam vibration energy harvester can be increased by using a variable thickness. A semianalytical model that takes both the dynamic and the electromechanical behaviour of the harvester into account showed that the energy harvested can be increased by 69 per cent when the thickness of the beam was varied. Varying the thickness of the beam also results in more uniform strain distribution, thereby increasing the amount of energy that can be harvested. 7 refs., 2 tabs., 6 figs." @default.
- W3200820844 created "2021-09-27" @default.
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- W3200820844 date "2009-07-01" @default.
- W3200820844 modified "2023-09-26" @default.
- W3200820844 title "Electromechanical performances of different shapes of piezoelectric energy harvesters" @default.
- W3200820844 hasPublicationYear "2009" @default.
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