反方向 Lamb 波混合产生的零组速度组合谐波的实验观测

IF 3.8 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics Pub Date : 2024-07-22 DOI:10.1016/j.ultras.2024.107413

Changyu Zhang , Weibin Li , Mingxi Deng

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引用次数: 0

摘要

在本文中，我们介绍了对零群速度（ZGV）组合谐波产生现象的实验观察，这种现象是由反方向的 Lamb 波混合引起的。我们利用内部共振条件，选择性地选择特定频率的主模对，以达到产生组合谐波的目的。为了探测 ZGV 组合谐波成分，我们提出了一种混合系统，其中包含用于产生的双楔形换能器和用于接收的激光干涉测量系统。我们在实验中清楚地观察到，在特定的混合频率上出现了预测的 S1-ZGV 组合谐波。此外，我们还在实验中验证了由 Lamb 波混合诱导产生的组合谐波的可控性。

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Experimental observation of zero-group velocity combined harmonic generated by counter-directional Lamb wave mixing

In this paper, we present an experimental observation of the phenomenon known as zero-group velocity (ZGV) combined harmonic generation, which is induced by the mixing of counter-directional Lamb waves. We utilize internal resonant conditions to selectively choose the primary mode pair at specific frequencies for the purpose of combined harmonic generation. To detect the ZGV combined harmonic component, we propose a hybrid system that incorporates dual wedge-transducers for generation and a laser interferometric system for receiving. The appearance of the predicted S₁-ZGV combined harmonic at a specific mixing frequency is clearly observed in our experiments. Furthermore, we experimentally verify the controllability of the generated combined harmonics induced by the mixing of Lamb waves.

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来源期刊

Ultrasonics 医学-核医学

CiteScore

7.60

自引率

19.00%

发文量

186

审稿时长

3.9 months

期刊介绍： Ultrasonics is the only internationally established journal which covers the entire field of ultrasound research and technology and all its many applications. Ultrasonics contains a variety of sections to keep readers fully informed and up-to-date on the whole spectrum of research and development throughout the world. Ultrasonics publishes papers of exceptional quality and of relevance to both academia and industry. Manuscripts in which ultrasonics is a central issue and not simply an incidental tool or minor issue, are welcomed. As well as top quality original research papers and review articles by world renowned experts, Ultrasonics also regularly features short communications, a calendar of forthcoming events and special issues dedicated to topical subjects.