Infrasound amplification using simple strongly nonlinear granular metamaterials

IF 2.8 3区工程技术 Q2 MECHANICS

International Journal of Non-Linear Mechanics Pub Date : 2025-06-02 DOI:10.1016/j.ijnonlinmec.2025.105160

Elbens Carlos Viana Reis , Luis Paulo Silveira Machado , Surajit Sen

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引用次数: 0

Abstract

Monodispersed and inverse tapered granular chains with grain sizes varying uniformly from small to large under external harmonic excitations are numerically investigated. The control parameters are the number of granules, driving amplitude, driving frequency, and tapering parameter. The frequency response is analyzed using the transfer function, where properties of transmission, amplification, and filtering of signals are observed. For monodispersed chains, amplification peaks are described by functions of the control parameters. For sufficiently long monodispersed chains, signals at low frequencies (

\approx 10 Hz

) are amplified. Inverse tapered chains exhibit similar behavior with shorter chain lengths, as do monodispersed chains modeled with forces between granules with nonlinearity greater than that of the Hertzian contact law. Potential applications are in the fields of geosciences and oceanography, life sciences, military applications, and environmental monitoring.

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利用简单的强非线性颗粒超材料进行次声放大

本文对外部谐波激励下粒径由小到大均匀变化的单分散和反锥形颗粒链进行了数值研究。控制参数为颗粒数、驱动振幅、驱动频率和锥度参数。使用传递函数分析频率响应，其中观察信号的传输、放大和滤波特性。对于单分散链，放大峰由控制参数的函数来描述。对于足够长的单分散链，低频（≈10Hz）的信号被放大。反锥形链在更短的链长下表现出类似的行为，单分散链在非线性大于赫兹接触律的颗粒间力模型中也表现出类似的行为。潜在的应用领域包括地球科学和海洋学、生命科学、军事应用和环境监测。

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 Non-Linear Mechanics 物理-力学

CiteScore

5.50

自引率

9.40%

发文量

192

审稿时长

67 days

期刊介绍： The International Journal of Non-Linear Mechanics provides a specific medium for dissemination of high-quality research results in the various areas of theoretical, applied, and experimental mechanics of solids, fluids, structures, and systems where the phenomena are inherently non-linear. The journal brings together original results in non-linear problems in elasticity, plasticity, dynamics, vibrations, wave-propagation, rheology, fluid-structure interaction systems, stability, biomechanics, micro- and nano-structures, materials, metamaterials, and in other diverse areas. Papers may be analytical, computational or experimental in nature. Treatments of non-linear differential equations wherein solutions and properties of solutions are emphasized but physical aspects are not adequately relevant, will not be considered for possible publication. Both deterministic and stochastic approaches are fostered. Contributions pertaining to both established and emerging fields are encouraged.