地震超材料：如何震动朋友和影响波？
Seismic metamaterial: how to shake friends and influence waves?
摘要：
在微米和纳米尺度上设计的材料在光子学和声子学中产生了巨大而持久的影响，其应用范围从周期性结构不允许光和声音在阻带频率下传播，到亚波长聚焦和超材料隐身。在这里，我们提出了一个地震测试的描述上的土壤结构在米级使用振动压实探头。与地震波相互作用的最简单的方法是改变介质的整体性质，作用于土壤密度，然后作用于波速。其主要概念是减少地震波在自由表面的放大，在地震工程学中称为场地效应。然而，抵消地震信号的另一种方法是通过修改地震能量的分布，这要归功于由在初始土壤中钻孔的垂直、圆柱形和空夹杂物的网格制成的超材料，与使用近似板模型的数值模拟一致。
英文摘要：
Materials engineered at the micro- and nano-meter scale have had a tremendous and lasting impact in photonics and phononics, with applications ranging from periodic structures disallowing light and sound propagation at stop band frequencies, to subwavelength focussing and cloaking with metamaterials. Here, we present the description of a seismic test held on a soil structured at the meter scale using vibrocompaction probes. The most simplistic way to interact with a seismic wave is to modify the global properties of the medium, acting on the soil density and then on the wave velocity. The main concept is then to reduce the amplification of seismic waves at the free surface, called site effects in earthquake engineering. However, an alternative way to counteract the seismic signal is by modifying the distribution of seismic energy thanks to a metamaterial made of a grid of vertical, cylindrical and empty inclusions bored in the initial soil, in agreement with numerical simulations using an approximate plate model.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
