论文标题
在线性压电式元结构中，自适应非偏波波衰减用单向电气传输线分流
Adaptive nonreciprocal wave attenuation in linear piezoelectric metastructures shunted with one-way electrical transmission lines
论文作者
论文摘要
与弹性介质相反，在电气元件之间很容易获得单向耦合功能，这可以实现电波的单向传输。在本文中，我们探索和利用了压电束与单向电气传输线的相互作用，以促进以线性方式促进弹性波的非偏置传输。进行理论分散分析和数值模拟，以揭示弹性波的传播行为，在所提出的压电元结构中。据发现，当引入单向电气耦合功能时，局部谐波带盖将保持在压电元结构的相反方向上。但是，与常规的局部共振元结构相比，一个方向的带隙衰减能力增加了，在细胞之间不存在电耦合，而在另一个方向上则降低了电耦合。因此，由于具有独特的带隙衰减能力，在该系统中出现了弹性波的非偏置传播。还揭示了这种非邻次波浪衰减能力具有单向电耦合系数和电池的电阻自适应。建立了压电元结构的实验设置，并实验结果验证了非交流性能及其适应性。总体而言，所提出的压电元结构提供了一种线性，简洁的方法，以实现弹性波的自适应非注射式传播。
In contrary to elastic media, it is easy to attain one-way coupling feature among electrical elements, which enables unidirectional transmission of electrical wave. In this paper, we explore and exploit the interaction of a piezoelectric beam with a one-way electrical transmission line to facilitate nonreciprocal transmission of elastic wave in the linear fashion. Theoretical dispersion analysis and numerical simulations are performed to reveal transmission behaviors of elastic wave in the presented piezoelectric metastructure. It is uncovered that, when the one-way electrical coupling feature is introduced, local-resonance bandgaps are maintained in opposite directions of the piezoelectric metastructure. However, the bandgap attenuation capability in one direction is increased compared to conventional local-resonance metastructures, in which no electrical coupling exists between cells, while that in the other direction is decreased. Therefore, nonreciprocal transmission of elastic wave emerges in this system due to the distinct bandgap attenuation capability. It is also revealed that this sort of nonreciprocal wave attenuation capability is adaptive with the one-way electrical coupling coefficient and the resistance of electrical cells. An experimental set-up of the piezoelectric metastructure is built and experimental results verify the nonreciprocity property and its adaptiveness. Overall, the presented piezoelectric metastructure provides a linear and concise approach to realize adaptive nonreciprocal transmission of elastic wave.
