Experimental investigation of amplification, via a mechanical delay-line, in a rainbow-based metamaterial for energy harvesting
Experimental investigation of amplification, via a mechanical delay-line, in a rainbow-based metamaterial for energy harvesting
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DOI：
10.1063/5.0023544
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发表时间：
2020-10-05
影响因子：
4
通讯作者：
Craster, R. V.
中科院分区：
文献类型：
--
作者：
De Ponti, J. M.;Colombi, A.;Craster, R. V.
我们通过实验证明，由连接在弹性梁上的梯度谐振棒阵列创建的彩虹基超材料，通过减缓表面弹性波来利用波与共振的相互作用，作为机械延迟线运行。实验表明，彩虹效应降低了主结构中传播波的振幅。同时，它大大增加了波与谐振器之间的相互作用周期和赋予收割机的杆中的波场振幅。因此，随着时间的推移，增加的能量被送入谐振器：我们展示了该系统增强的能量收集能力。
We experimentally demonstrate that a rainbow-based metamaterial, created by a graded array of resonant rods attached to an elastic beam, operates as a mechanical delay-line by slowing down surface elastic waves to take advantage of wave interaction with resonance. Experiments demonstrate that the rainbow effect reduces the amplitude of the propagating wave in the host structure. At the same time, it dramatically increases both the period of interaction between the waves and the resonators and the wavefield amplitude in the rod endowed with the harvester. Increased energy is thus fed into the resonators over time: we show the enhanced energy harvesting capabilities of this system.