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首页> 外文期刊>International journal of non-linear mechanics >Impact based wideband nonlinear resonating metamaterial chain
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Impact based wideband nonlinear resonating metamaterial chain

机译：基于冲击的宽带非线性共振超材料链

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Due to the out of phase vibration of the internal units, unusual frequency dependent extreme properties, such as negative effective mass, can be perceived in a metamaterial. However, the performance of the linear metamaterial is limited to a narrow bandwidth due to the dependency on linear resonance. In this paper, this main limitation of the metamaterial is addressed by introducing the piecewise linear impacting oscillator at the mass in-mass resonating unit. The impacting system dissipates energy and consequently attenuates the vibration of the main structure due to the counteraction of the external excitation by the resulting impulse force. Attenuation bandwidths can be increased in higher and lower frequency side for impact metamaterial as it can attenuate the two transmission peaks. In the lower frequency side attenuation bandwidth can be increased 50% and in the higher frequency side it theoretically becomes infinite. Therefore, impacting metamaterial can be considered as a potential solution towards low frequency and wideband vibration isolator. This paper also thoroughly discussed different nonlinear responses in each units of metamaterial chain.
机译：由于内部单元的异相振动，可以在超材料中感知到异常频率相关的极端特性，例如负有效质量。然而，由于对线性共振的依赖性，线性超材料的性能被限制在窄带宽内。在本文中，通过在质量质量共振单元处引入分段线性冲击振荡器，可以解决超材料的主要局限性。冲击系统会耗散能量，从而由于产生的脉冲力抵消了外部激励而削弱了主体结构的振动。冲击超材料的衰减带宽可以在较高和较低的频率侧增加，因为它可以衰减两个传输峰值。在低频侧，衰减带宽可以增加50％，而在高频侧，理论上带宽是无限的。因此，可以将撞击的超材料视为解决低频和宽带隔振器的潜在方法。本文还彻底讨论了超材料链每个单元中的不同非线性响应。

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