Intrinsic polarization and high-frequency broadband asymmetric transmission of flexural wave in beams

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-09-30 DOI:10.1016/j.apacoust.2025.111106

Yuxuan Zhang , Jinfeng Zhao , Weitao Yuan , Pengfei Li , Fan Yang , Yongdong Pan

引用次数: 0

Abstract

Recently, the spin-momentum locking of elastic wave have been uncovered in beam structures. This work provides a theoretical and experimental study on flexural beam wave, as frequency goes from low to high values. First, both Timoshenko’s and Euler’s beam theories are used to reveal the polarization of general displacement, as well as the spin angular momentum of flexural wave. Then, the chiral spin source is built up, and the resonance of source cube is observed to reverse the polarization of source cube itself. After that, the same signal pair are put upon chiral source cube. The asymmetric transmission of flexural wave is experimentally observed, from low to high frequency, witnessing the reversal of asymmetric direction due to source resonance. These theoretical and numerical results confirm the spin-momentum locking for flexural wave, within broad frequency range, and evidence the influences of source cube resonance.

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梁内弯曲波的本征极化与高频宽带不对称传输

近年来，弹性波在梁结构中的自旋动量锁定现象已被发现。本文对频率由低到高的弯曲梁波进行了理论和实验研究。首先，利用Timoshenko和Euler的光束理论揭示了一般位移的极化，以及弯曲波的自旋角动量。然后，建立手性自旋源，观测到源立方体的共振使源立方体自身的极化发生逆转。然后，将相同的信号对置于手性源立方体上。实验观察到弯曲波从低频到高频的不对称传播，由于源共振导致不对称方向的逆转。这些理论和数值结果证实了弯曲波在较宽频率范围内的自旋动量锁定，并证明了源立方共振的影响。

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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来源期刊

Applied Acoustics 物理-声学

CiteScore

7.40

自引率

11.80%

发文量

618

审稿时长

7.5 months

期刊介绍： Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense. Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems. Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.