Underwater cylindrical sandwich meta-structures composed of graded semi re-entrant zero Poisson’s ratio metamaterials with pre-strained wave propagation properties  

作　　者：Qing Li Zeping Wang Xiang Mao Deqing Yang 

机构地区：[1]State Key Laboratory of Ocean Engineering,School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [2]College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China [3]Qingdao Innovation and Development Center of Harbin Engineering University,Qingdao 266000,China [4]SJTU Yazhou Bay Institute of Deepsea SCI-TECH,Sanya 572024,China

出　　处：《Journal of Ocean Engineering and Science》2024年第6期541-553,共13页海洋工程与科学（英文）

基　　金：support provided to the first author by the Natural Science Foundation of China(No.52201371);the Postdoctoral Science Foundation of China(No.2021M692043);the Postdoctoral Excellence Program of Shanghai(No.2021200)is gratefully acknowledged.

摘　　要：Zero Poisson’s ratio(ZPR)mechanical metamaterials can yield no transverse displacements when unidi-rectionally compressed,and cylindrical sandwich meta-structures composed of semi re-entrant(SRE)ZPR metamaterials are thus explored for applications on cylindrical shells of underwater equipment or sub-mersible structures.A group of ZPR unit cells with specified pre-strained wave propagation characteristics and adequate load-bearing capabilities is optimally designed based on the periodic boundary condition(PBC)and Bloch’s Theorem.The sound transmission and pressure-resistant performance of cylindrical sandwich meta-structures comprising the homogeneous and graded SRE ZPR unit cells are then investi-gated.The results show that the designed meta-structures can perfectly yield better vibroacoustic atten-uation behavior within the specified frequency regions corresponding to the pre-strained band gaps and safely bear the hydrostatic pressure equivalent to 1000 m depth with low weight-bulk ratios.In addition,the functionally graded metamaterial core can boost vibroacoustic performance within broader frequency ranges.

关 键 词：Cylindrical sandwich meta-structure Zero Poisson’s ratio Unit cell Pre-strained Wave propagation Pressure-resistant 

分 类 号：TB34[一般工业技术—材料科学与工程]