Sound absorption characteristic of micro-helix metamaterial by 3D printing  

作　　者：Nansha Gao Hong Hou 

机构地区：[1]School of Marine Science and Technology,Northwestern Polytechnical University

出　　处：《Theoretical & Applied Mechanics Letters》2018年第2期63-67,共5页力学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (11704314 and 11474230);the Fundamental Research Funds for the Central Universities (3102016QD056) for financial support

摘　　要：We present the design of micro-helix metamaterial supporting high sound absorption characteristic by 3D printing. The sample structure which is fabricated out of polylactide （PLA） material, many micro-helix are arranged by periodic arrays on XY plane. Experiment measurement results show that different geometrical dimensions of helix vestibule and cavity depth have a great effect on sound absorption coefficient. Physical mechanism depends on the friction and viscosity between the air and the helix vestibule. This work shows great potential of micro-structure metamaterial in noise control applications require light weight and large rigid of sound absorption.We present the design of micro-helix metamaterial supporting high sound absorption characteristic by 3D printing. The sample structure which is fabricated out of polylactide （PLA） material, many micro-helix are arranged by periodic arrays on XY plane. Experiment measurement results show that different geometrical dimensions of helix vestibule and cavity depth have a great effect on sound absorption coefficient. Physical mechanism depends on the friction and viscosity between the air and the helix vestibule. This work shows great potential of micro-structure metamaterial in noise control applications require light weight and large rigid of sound absorption.

关 键 词：Low frequency sound absorption Micro-helix metamaterial 3D printing Helix vestibule Cavity depth 

分 类 号：TB303[一般工业技术—材料科学与工程]