Nonlinear Mechanical Roton

2023/01/04 by Zhonglei Duan, Jianguo Cui, Li-Qun Chen +2
Engineering · Physics and Astronomy · #Acoustic Wave Phenomena Research #Vibration and Dynamic Analysis #Nonlinear Photonic Systems

paper · doi:10.1115/1.4056583

Abstract

Abstract The roton-like dispersions support the “return flow” of acoustic waves; such phenomena were only observed in quantum systems. In this paper, we aim to investigate the nonlinear roton-like dispersion in a mechanical metamaterial with both nonlinear chains and nonlinear resonators with nonlocal connection; both theoretical and numerical methods are used to analyze the system, and some new phenomena such as amplitude-dependent roton-like behaviors are observed. This work opens a new way for designing an extremely low-frequency vibration isolator with a stable configuration.

Citations

• Dynamics of Phononic Materials and Structures: Historical Origins, Recent Progress, and Future Outlook

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