声波超材料设计的力学原理与进展

声波超材料是一种特殊的人工复合材料,它基于连续介质力学理论描述,通过对微观结构的精心设计,在宏观上获得反常规的动态材料属性,如负动态质量,负动态模量,负折射率等.超材料的出现为实现波动控制提供了可能,相关研究在工程领域具有潜在的应用价值.本文着重阐述了弹性固体超材料、声波超材料、超表面、主动超材料的设计原理与相关研究进展, 所述原理对于波控结构的设计与制备实现具有指导意义.

Mechanics concepts and Advances of Acoustic Metamaterials Design

Acoustic metamaterials are a special type of man-made composite materials that are characterized in the framework of continuum medium theory.They obtain anomalous dynamic material properties, such as negative dynamic mass, negative dynamic modulus, negative refraction, by careful designs of micro-scale structures.The metamaterial concept brings us the opportunity of wave propagation control, as make metamaterials potentially applied in practical engineering.This review paper aims at explaining the concept of microstructure design of elastic and acoustic metamaterials, acoustic metasurfaces, and active metamaterials, as well as the relevant research advances.The generalized concept may be of benefit to the design and material realization of wave control structures.