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| 题名: | Energy harvesting analysis of the magneto-electric and fluid-structure interaction parametric excited system |
| 作者: | Wang, Yi-ren |
| 关键词: | Vibration energy harvesting system;Fluid-structure interaction;Parametric excitation;Nonlinear vibration |
| 日期: | 2023-10-10 |
| 上传时间: | 2023-10-25 12:05:27 (UTC+8) |
| 出版者: | Elsevier |
| 摘要: | This research proposes an innovative design of a fluid-solid coupling vibration energy harvesting
system (VEH system) that includes a downstream waterwheel driven by the flow field, which, in
turn, drives gears and connecting rods to rotate a wheel equipped with magnets to generate
electricity by changing the magnetic field. A piezoelectric patch (PZT) is installed upstream of the
pipeline with a magnet attached to it. The repulsive force between the magnet on the wheel and
the magnet on the PZT generates additional force while also creating vibration through fluid-solid
coupling of the pipeline. The study derives a theoretical model of the nonlinear vibrating beam
and couples it with the piezoelectric and magneto-electric equations to simulate the vibration of
the fixed-fixed elastic pipe. The method of multiple scales (MOMS), fixed points plots, phase plots,
and Poincar´e maps are employed to verify the theoretically predicted parametric excitation
properties of the system. The study uses the Biot-Savart Law to calculate the theoretical magnetic
force and combines it with the fluid-conveying nonlinear beam and the PZT to create a magnetoelectric
coupling fluid pipeline vibration energy harvesting model. The study conducts a simple
experiment to verify the feasibility of the theoretical model and demonstrates that the repulsive
force of the magnet significantly enhances the electric generation benefit of the system.
Regardless of whether the PZT is located in the curved or flat area (straight part) of the nonlinear
beam, the addition of magnets to the system significantly increases voltage generation efficiency
by more than 190 % when compared to systems without magnets. |
| 關聯: | Journal of Sound and Vibration 569, 118087 |
| DOI: | 10.1016/j.jsv.2023.118087 |
| 显示于类别: | [航空太空工程學系暨研究所] 期刊論文
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