One-way transmission of elastic waves in phononic beams

IF 7.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Mechanical Sciences Pub Date : 2025-05-13 DOI:10.1016/j.ijmecsci.2025.110377

L. Chen , C.Z. Zhang , G.H. Nie

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引用次数: 0

Abstract

Many researches on asymmetric or one-way transmission mostly focus on one mode type of the elastic waves, but there is little work on asymmetric transmission of multiple modes in the same structure. The beam-like structures are designed in this paper to allow four different modes of the elastic waves to be asymmetrically transmitted. We investigate the band structures of the designed phononic beams with both antisymmetric and symmetric structures are analyzed, and explanation on how a possible one-way wave transmission behavior can be obtained for four kinds of the elastic wave modes are given in details by exploiting the mode conversion and mode selection in the linear beam systems. The one-way transmission of the elastic waves in the phononic beams with a finite superlattice are numerically demonstrated. The results show that the incident waves of a considered wave mode are converted into another wave mode after passing through the superlattice in the forward direction but are rejected in the backward direction. The displacement field for different beam sections are calculated to illustrate the wave mode conversion and filtering phenomena.

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弹性波在声子束中的单向传输

许多关于非对称或单向传输的研究大多集中在弹性波的一种模态类型上，而对同一结构中多模态的非对称传输的研究很少。本文设计了允许四种不同模态弹性波不对称传播的类梁结构。我们研究了所设计的声子光束的带结构，分析了对称和反对称结构，并详细解释了如何利用线性光束系统中的模式转换和模式选择来获得四种弹性波模式的可能的单向波传输行为。用数值方法证明了弹性波在有限超晶格声子束中的单向传输。结果表明，所考虑的波模的入射波在正向穿过超晶格后转换为另一种波模，而在反向穿过超晶格时被拒绝。计算了不同截面梁的位移场，说明了波模转换和滤波现象。

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

International Journal of Mechanical Sciences 工程技术-工程：机械

CiteScore

12.80

自引率

17.80%

发文量

769

审稿时长

19 days

期刊介绍： The International Journal of Mechanical Sciences (IJMS) serves as a global platform for the publication and dissemination of original research that contributes to a deeper scientific understanding of the fundamental disciplines within mechanical, civil, and material engineering. The primary focus of IJMS is to showcase innovative and ground-breaking work that utilizes analytical and computational modeling techniques, such as Finite Element Method (FEM), Boundary Element Method (BEM), and mesh-free methods, among others. These modeling methods are applied to diverse fields including rigid-body mechanics (e.g., dynamics, vibration, stability), structural mechanics, metal forming, advanced materials (e.g., metals, composites, cellular, smart) behavior and applications, impact mechanics, strain localization, and other nonlinear effects (e.g., large deflections, plasticity, fracture). Additionally, IJMS covers the realms of fluid mechanics (both external and internal flows), tribology, thermodynamics, and materials processing. These subjects collectively form the core of the journal's content. In summary, IJMS provides a prestigious platform for researchers to present their original contributions, shedding light on analytical and computational modeling methods in various areas of mechanical engineering, as well as exploring the behavior and application of advanced materials, fluid mechanics, thermodynamics, and materials processing.