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Tunable topological interface states via a parametric system in composite lattices with/without symmetric elements

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Tunable topological interface states via a parametric system in composite lattices with/without symmetric elements
Over the past decades,topological interface states have attracted signifi-cant attention in classical wave systems.Generally,research on the topological interface states of elastic waves is conducted in the lattices with symmetric elements.This paper proposes composite lattices with/without symmetric elements,and demonstrates the re-alization of tunable topological interface states of elastic waves via parametric systems.To quantize the topological characteristics of the bands,a modified Zak phase is defined to calculate the topological invariant by the eigenstates for the lattices with/without sym-metric elements.The numerical results show that the tunable frequencies of topological interface states can be realized in composite lattices with/without symmetric elements through the modulation of the parametric excitation frequency.The tunable topological interface states can be introduced into the vibration energy harvesting to design efficient and steady energy harvesting systems.

metamaterialtopological interface stateparametric excitationasym-metric elementmodified Zak phase

Jianguo CUI、Tianzhi YANG、Wenju HAN、Liang LI、Muqing NIU、Liqun CHEN

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School of Mechanics and Photoelectric Physics,Anhui University of Science and Technology,Huainan 232001,Anhui Province,China

School of Mechanical Engineering and Automation,Northeastern University,Shenyang 110819,China

School of Aerospace Engineering,North University of China,Taiyuan 030051,China

School of Science,Harbin Institute of Technology,Shenzhen,Shenzhen 518055,Guangdong Province,China

Shanghai Key Laboratory of Mechanics in Energy Engineering,Shanghai Institute of Applied Mathematics and Mechanics,School of Mechanics and Engineering Science,Shanghai University,Shanghai 200444,China

Shanghai Institute of Aircraft Mechanics and Control,Shanghai 200092,China

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metamaterial topological interface state parametric excitation asym-metric element modified Zak phase

2024

10.1007/s10483-024-3194-9

应用数学和力学(英文版)
上海大学

应用数学和力学(英文版)

影响因子：0.294
ISSN：0253-4827
年,卷(期)：2024.45(12)