论文部分内容阅读
一、声超常材料的研究进展近年来,声超常材料在很多领域有着迅猛的发展。声超常材料属于人工复合结构或复合材料。由于其结构尺度或材料分布的变化周期远小于声波长,声超常材料具有很多天然材料所不具备的声学特性。超常材料最大的优势在于其能够实现对声波以及弹性波的任意调控。其核心思想在于采用尺寸远小于入射波长的人工结构构建出等效参数满足特定分布的复合材料。
First, the research progress of acoustic metamaterials In recent years, acoustic metamaterials have developed rapidly in many fields. Acoustic abnormal material is artificial composite structure or composite material. Acoustic metamaterials have many acoustic properties not found in natural materials due to the fact that their structural scales or material distributions vary much less than the acoustic wavelength. The biggest advantage of metamaterials is that they allow arbitrary control of acoustic and elastic waves. The core idea is to use the artificial structure with the size much smaller than the incident wavelength to construct the composite material whose equivalent parameters meet the specific distribution.