Realization of nonreciprocal acoustic energy transfer using an asymmetric strong nonlinear vibroacoustic system

IF 3.4 Q1 ENGINEERING, MECHANICAL
Jiangming Jin, Jingxiao Huang, Yuepeng Xiao
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引用次数: 0

Abstract

In this paper, an asymmetric vibroacoustic system that can passively realize nonreciprocal transmission of acoustic energy is reported. This experimental system consists of a waveguide, a strongly nonlinear membrane, and three acoustic cavities with different sizes. The theoretical modeling of the system is verified by experiments, and parametric analysis is also carried out. These intensive studies reveal the nonreciprocal transmission of acoustic energy in this prototype system. Under forward excitation, internal resonance between the two nonlinear normal modes of the vibroacoustic system occurs, and acoustic energy is irreversibly transferred from the waveguide to the nonlinear membrane. However, under backward excitation, there is no internal resonance in the system. Energy spectra and wavelet analysis are used to highlight the mechanism of nonreciprocal transfer of acoustic energy. Consequently, nearly unidirectional (preferential) transmission of acoustic energy transfer is shown by this system. The nonreciprocal acoustic energy transfer method illustrated in this paper provides a new way to design the odd acoustic element.

Abstract Image

利用非对称强非线性振声系统实现非互惠声能传递
本文报告了一种非对称振动声学系统,它可以被动地实现声能的非互易传输。该实验系统由波导、强非线性膜和三个不同尺寸的声腔组成。实验验证了系统的理论模型,并进行了参数分析。这些深入研究揭示了声能在该原型系统中的非对等传输。在正向激励下,振声系统的两个非线性法向模态之间发生内部共振,声能不可逆转地从波导传递到非线性膜。然而,在反向激励下,系统不存在内部共振。能谱和小波分析被用来强调声能非互惠传递的机制。因此,该系统显示出近乎单向(优先)的声能传递。本文阐述的非互惠声能传递方法为奇异声学元件的设计提供了一种新方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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