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Broadband passive nonlinear acoustic diode

机译：宽带被动非线性声学二极管

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摘要

In dynamical and acoustical systems, breaking reciprocity is achievable by employing external biases, spatial temporal variations of material properties, or nonlinearities. In this present work, we propose, theoretically analyze, and experimentally demonstrate the first passive broad-band mechanical diode, by adding an asymmetric local nonlinear interface to an otherwise linear waveguide. It is shown that for a broad range of input energies and frequencies, three different types of nonreciprocal behavior are obtained, (i) different transmitted energies depending on the direction of wave propagation, (ii) transmission of acoustic waves allowed in one direction but not in the reverse direction, and (iii) arrest of propagating waves at the nonlinear interface only in one (preferred) direction. A unique feature of the proposed acoustic device compared with previous designs is its capability to achieve passive nonreciprocity without altering or distorting the frequency content of the sending signal. The proposed system can pave the way for designing passive acoustic or thermal diodes, and adaptable nonreciprocal wave transmission devices of enhanced robustness that are tunable with, and passively adaptive to energy.
机译：在动态和声学系统中，通过采用外部偏差，材料特性的空间时间变化或非线性来实现破坏往复性。在本工作中，我们通过将非对称的局部非线性接口添加到其他线性波导，理论上，理论上分析和实验地展示第一被动宽带机械二极管。结果表明，对于广泛的输入能量和频率，获得了三种不同类型的非传导行为，（i）根据波传播方向的不同透射能量，（ii）在一个方向上允许的声波传输，但不是在反向方向上，（iii）仅在一个（优选）方向上仅在非线性界面处传播波。与先前的设计相比，所提出的声学设备的独特特征是其能够实现无源非渗透性而不改变或扭曲发送信号的频率内容。所提出的系统可以为设计被动声或热二极管的方式铺平道路，以及可调谐的增强鲁棒性的适应性的非探测波传输装置，并被动地自适应能量。

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  • 来源
    《Physical review》 |2019年第21期|214305.1-214305.7|共7页
  • 作者

    Darabi Amir; Fang Lezheng; Mojahed Alireza; Fronk Matthew D.; Vakakis Alexander F.; Leamy Michael J.;

  • 作者单位

    Georgia Inst Technol Woodruff Sch Mech Engn Atlanta GA 30332 USA|Univ Illinois Dept Mech Sci & Engn Champaign IL 61801 USA;

    Georgia Inst Technol Woodruff Sch Mech Engn Atlanta GA 30332 USA;

    Univ Illinois Dept Mech Sci & Engn Champaign IL 61801 USA;

    Georgia Inst Technol Woodruff Sch Mech Engn Atlanta GA 30332 USA;

    Univ Illinois Dept Mech Sci & Engn Champaign IL 61801 USA;

    Georgia Inst Technol Woodruff Sch Mech Engn Atlanta GA 30332 USA;

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