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- W4281557211 abstract "Locally resonant metamaterials (LRMs), with unit-cells exhibiting local resonance, present extraordinary wave propagation properties as a result of their spatial periodicity. However, these structures present certain limitations when wide bandgaps are sought, such as the need of heavy resonating masses. In this paper, a simple dynamic directional amplification (DDA) mechanism is proposed as a means to artificially increase inertia of the resonating mass. The DDA is realized by imposing kinematic constraints to the model's degrees of freedom (DoFs), hence inertia is increased by coupling the horizontal and vertical motion of a reference two-dimensional (2D) mass-in-mass lattice. A discrete element lattice model based on mass, stiffness, and damping elements, is used to establish dispersion behavior and frequency response, while results indicate broader bandgaps and significant improvements compared to the reference LRM. At last, a preliminary design of a DDA-metabarrier is presented as a proof of concept, showcasing the potential application of the mechanism as a seismic wave mitigation measure." @default.
- W4281557211 created "2022-05-27" @default.
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- W4281557211 date "2022-10-01" @default.
- W4281557211 modified "2023-10-12" @default.
- W4281557211 title "Locally resonant metamaterials utilizing dynamic directional amplification: An application for seismic mitigation" @default.
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- W4281557211 doi "https://doi.org/10.1016/j.apm.2022.05.037" @default.
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