15 April 2016 Using the group of non-linear cells design metamaterial bar
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Abstract
The paper presents the wave propagation in one-dimensional metamaterial bar with attached group of non-linear local oscillators by using analytical and numerical models. The focus is on the influence of group of non-linear cells on the filtering properties of the bar in the 1000Hz to 2000Hz range. Group of Periodic cells with alternating properties exhibit interesting dynamic characteristics that enable them to act as filters. Waves can propagate along bars within specific bands of frequencies called pass bands, and attenuate within bands of frequencies called gaps. Gaps in structures with group of periodic cells are located according on the frequency of cells. From the cell, we can yield the effect negative stiffness and effect negative mass. We can also design the gaps from attached oscillators or cells. In the uniform case the gap is located around the resonant frequency of the oscillators, and thus a stop band can be created in the lower frequency range. In the case with group of non-linear cells the results show that the position of the gap can be designed, and the design depends on the amplitude and the degree of non-linear cells.
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Hongwei Sun, Hongwei Sun, Xin Song, Xin Song, Xiaolei Hu, Xiaolei Hu, Jinliang Gu, Jinliang Gu, "Using the group of non-linear cells design metamaterial bar", Proc. SPIE 9799, Active and Passive Smart Structures and Integrated Systems 2016, 97993G (15 April 2016); doi: 10.1117/12.2219572; https://doi.org/10.1117/12.2219572
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