Design of elliptical underwater acoustic cloak with truss-latticed pentamode materials  

作　　者：Yuanyuan Ge Xiaoning Liu Gengkai Hu 

机构地区：[1]School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China

出　　处：《Theoretical & Applied Mechanics Letters》2022年第4期221-226,共6页力学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.11972080,11972083 and 11991030);the Innovation Foundation of Maritime Defense Technologies Innovation Center(Grant No.JJ-2021-719-06).

摘　　要：Pentamode acoustic cloak is promising for underwater sound control due to its solid nature and broadband efficiency,however its realization is only limited to simple cylindrical shape.In this work,we established a set of techniques for the microstructure design of elliptical pentamode acoustic cloak based on truss lattice model,including the inverse design of unit cell and algorithms for latticed cloak assembly.The designed cloak was numerically validated by the well wave concealing performance.The work proves that more general pentamode acoustic wave devices beyond simple cylindrical geometry are theoretically feasible,and sheds light on more practical design for waterborne sound manipulation.

关 键 词：Elliptical acoustic cloak Pentamode material Microstructure design Truss lattice 

分 类 号：TB56[交通运输工程—水声工程]