A metamaterial structure capable of wave attenuation and concurrent energy harvesting

Abstract

In this study, the capability of wave attenuation as well as energy harvesting in a metamaterial beam with built-in resonators is presented. Each resonator consists of a pretensioned elastic membrane and split-ring masses. The flexural wave band characteristics, eigenmodes, and frequency response are predicted by finite element method. Experiments are conducted to verify the finite element results. The results show that, with proper resonators, vibration caused by disturbances can be conspicuously attenuated at certain frequencies. The attenuation region can be manipulated by adjusting the properties of the membrane-split-ring system. Besides, by adding piezoelectric patches to the membrane, the stored energy in the local resonator can be converted into electric power. The generated voltage output reaches a maximum at the frequency where wave is greatly attenuated. Finally, it is shown that double-layer resonators with parallel connection can generate twice as much voltage as the single-layer resonator.

A Metamaterial-Inspired Structure for Simultaneous Vibration Attenuation and Energy Harvesting

“…For example, the measured bandwidth of the first bandgap (205-257 Hz) is wider than the bandwidth of the COMSOL simulation-based first bandgap. A similar observation was made and reported by Chen et al [14]. is may be attributed to some of the approximations made in the model simulations including absence of damping [14] or other experimental variations such as insignificant distortion in the metamaterial structure during the experiment.…”

“…Compared with other efforts and available literature, the metamaterial structure we present in this work is shown to generate, significantly, more electric power while maintaining its ability to attenuate undesired vibrations. Additionally, the presented structure requires lower load resistance to achieve optimum power transfer, compared with what has been presented in the literature [13][14][15]. is is an important feature of the presented structure because, typically, electronic circuits for sensors require an input current in the order of 10 mA [17].…”

“…Concurrent vibration attenuation and energy harvesting metamaterials have been recently, also, demonstrated. Chen et al built a metamaterial beam embedded with periodic cells that consist of membrane-split-ring resonators [14]. PVDF piezoelectric patch was attached to the membranes to convert the kinetic energy captured by the resonators into useful electric power.…”

Simultaneous energy harvesting and vibration attenuation in piezo-embedded negative stiffness metamaterial

“…Researchers also proposed many methods to control band gap for optimization of the dual functionality of the metamaterial. Based on this, Chen et al (2019) proposed a metamaterial structure which can attenuate waves along with energy harvesting. Sugino et al (2017, 2018) developed a general theory for band gap estimation in the locally resonant metastructures using modal analysis.…”

Recent Advances in Non-Traditional Elastic Wave Manipulation by Macroscopic Artificial Structures

“…If a synthetic substance has either negative ρ or negative K, then waves within that substance have an imaginary-valued velocity, so they attenuate rather than propagate or reflect. These novel characteristics of EMTMs lead to various applications such as passive vibration attenuation systems [18][19][20][21][22][23][24][25], active vibration attenuation systems [26][27][28][29], energy harvesters [30][31][32], energy dissipation systems [33,34], seismic barriers [35][36][37][38][39][40][41][42], viscoelastic systems [43,44], non-reciprocal elastic wave propagation systems [45][46][47], gyroscopic metamaterials [48,49] and elastic topological phononic crystals [50,51].…”