硅酸盐通报2017，Vol.36Issue(1)：333-339,7.
环形局域共振弹性膜结构低频隔声特性分析
Analysis of Low-Frequency Sound Insulation Characteristics for a Circular Membrane-ring Structure of Locally Resonant
摘要
Abstract
Aiming at the nonlinear PIO problem caused by Aero-engine noise during ultra-low-altitude airdrop process, a circular membrane-ring structure mode local resonance mechanism resonators was applied to reduce noise and vibration. The analysis of band gap formation mechanisms , the width of band gap affect factors, and sound insulation quantities by theoretical analysis and simulation test. The simulation test results show that the locally resonant band gap is the consequence of the local resonances and the traveling wave modes interactions. The coupling strength affect bandwidth and sound insulation effect directly,which depends on thin membrane size and surface density, so the greater the radius of inner and the surface density, the wider band-gap, the higher the resonant frequency; sound Insulation depends on the thin membrane surface density,the circular surface density and the position of center ring. This research result that the structure has a good sound insulation of characteristics by optimizing structure parameters, which suppress vibration and improve flying qualities of transport effectively.关键词
局域共振/带隙机理/带隙宽度/隔声特性Key words
local resonance/band-gap mechanism/width band gap/sound insulation characteristic分类
数理科学引用本文复制引用
张佳龙,姚宏,杜军,孙悦,孙嫣然,谭婧,张秀瑜..环形局域共振弹性膜结构低频隔声特性分析[J].硅酸盐通报,2017,36(1):333-339,7.基金项目
国家自然科学基金(11504429) （11504429）
陕西省自然科学基础研究计划(2015JQ5155) （2015JQ5155）
