液晶与显示Issue(2)：234-239,6.DOI:10.3788/YJYXS20153002.0234
可调谐的宽频带负体弹模量吸声超构材料
Tunable broadband sound absorbing metamaterial with negative modulus
摘要
Abstract
Based on the concept of local resonance,a kind of tunable broadband sound absorption meta-material consisting of helmholtz resonator (HR)with negative modulus was designed.The resonant frequency of the metamaterial can be tuned by changing the bore diameter drilled in the HR.The transmission curve of the metamaterial was simulated by using COMSOL Multiphysics,and then the modulus of the metamaterial can be obtained via extraction method.Simulation results confirm that the present metamaterial can accomplish negative modulus at the resonant frequency,simultaneously showing excellent property of sound absorption.A kind of metamaterial with broadband sound ab-sorption from 970 to 1 300 Hz was constructed by periodically arraying two layers of HRs.Excellent sound absorption appears in the sound absorption band with minimum transmission -22 dB.Metama-terial with any wanted bandwidth of negative modulus and sound absorption in audio-frequency range can be obtained by periodically arraying multilayers of HRs with different resonant frequencies.It is expected that the proposed metamaterial will significantly contribute to the design of broadband nega-tive modulus and sound absorption metamaterial.关键词
亥姆霍兹共振器/宽频带/负体弹模量/吸声/超构材料Key words
helmholtz resonator/broadband/negative modulus/sound absorption/metamaterial分类
数理科学引用本文复制引用
陈怀军,赵文霞,郝长春..可调谐的宽频带负体弹模量吸声超构材料[J].液晶与显示,2015,(2):234-239,6.基金项目
国家自然科学基金(No．21402114) （No．21402114）
宁夏自然科学基金(No．NZ13209,No．N214277) （No．NZ13209,No．N214277）
宁夏高等学校科学研究项目(No．NGY2013109,宁教高〔2014〕222) （No．NGY2013109,宁教高〔2014〕222）
宁夏师范学院重点科学研究项目(No．ZD2011002) （No．ZD2011002）
