Chaoyu Sun , Ailing Song , Siyuan Peng , Yanxun Xiang
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引用次数: 0
Abstract
This paper proposes an efficient realization method for multi-mode guided wave manipulation based on the dynamic geometric phase mechanism. The properties of the elastic elements capable of generating mode conversion are first discussed and a geometric structure is designed according to the properties. Then the genetic algorithm and simplex method are used to optimize the geometric structure of the independent unit to achieve perfect mode conversion. The theoretical analysis has proved that dynamic phase and geometric phase mechanisms can realize the phase modulation 0-2π for any mode. The multi-mode guided wave manipulation including anomalous refraction, beam splitting, and focusing is numerically and experimentally achieved by the mode-converting meta-cell with arbitrary input and output mode waves. This work solves the multi-mode manipulation problem in the guided wave system, which may provide a new solution for precisely engineering elastic waveform manipulation.
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.
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