硅酸盐学报2016，Vol.44Issue(10)：1440-1445,6.DOI:10.14062/j.issn.0454-5648.2016.10.08
基于局域共振型声子晶体在机舱内低频隔声特性
Low Frequency Sound Insulation Characteristics of the Locally Resonant Phononic Crystals in the Large Aircraft Cabin
摘要
Abstract
A kind of the octagon ring local resonance phononic crystal structure was proposed. The band gap formation mechanisms, the width of band gap affect factors, and sound insulation characteristics were analyzed by a finite element method. It is found that the resonance frequency is the results of interaction between the local resonances and the elastic waves, and the bandwidth and the sound attenuation rate of elastic waves depend on the interaction strength and have an impact on the sound insulation characteristics. Moreover, the transmission loss is related to the parameter characteristics of the octagon ring core and capping layer materials. These results indicate that the increase of the mass core and the capping layer densit as well as the decrease of the octagon ring side length and the elastic modulus of the capping layer lead to the width of band-gap, the high transmission loss of the first peak of sound insulation and the first sound insulation peak shifting to low-frequency simultaneously. This result shows that the structure has a good sound insulation of characteristics by optimizing the structure parameters, which has a theoretical impact in the aircraft cabin.关键词
声子晶体/局域共振/带隙机理/优化结构/隔声特性Key words
phononic crystal/local resonance/band-gap mechanism/optimizing structure/sound insulation characteristics引用本文复制引用
张佳龙,姚宏,杜军,赵静波,董亚科,祁鹏山..基于局域共振型声子晶体在机舱内低频隔声特性[J].硅酸盐学报,2016,44(10):1440-1445,6.基金项目
国家自然科学基金(11447147，11504429))；陕西省自然科学基础研究计划(2015JQ5155)项目。 （11447147，11504429）
