物理学报Issue(2)：024301-1-024301-6,6.DOI:10.7498/aps.63.024301
基于局域共振单元实现声子晶体低频多通道滤波
Phononic crystal multi-channel low-frequency filter based on locally resonant unit
摘要
Abstract
In this pager, we theoretically propose a model for low-frequency multi-channel filtering of phononic crystal composed of locally resonant units By introducing the resonance units with different filling rates into two-dimensional three-component locally resonant phononic crystal, a waveguide is built Its band structure transmission curve and transmitted sound pressure field map are calculated by the finite element method This design results in a low frequency range of the band gap emergence of new discrete mode around the different resonant frequencies of the scatterer These discrete modes enable the corresponding sound wave to propagate along the waveguide direction in phononic crystal waveguide The discrete model is only associated with the respective resonant unit, so it has a strong anti-jamming capability It provides a new theoretical basis for the multi-channel low-frequency filter.关键词
声子晶体/局域共振/分立模/多通道Key words
phononic crystals/locally resonant/discrete mode/multi-channel引用本文复制引用
程聪,吴福根,张欣,姚源卫..基于局域共振单元实现声子晶体低频多通道滤波[J].物理学报,2014,(2):024301-1-024301-6,6.基金项目
广东省自然科学基金重点项目(批准号：S2012020010885)和广东省科技计划项目(批准号:2012b01010036)资助的课题.@@@@ Project supported by Guangdong Province Natural Science Fund Project, China (Grant No. S2012020010885) and Guang-dong Province Science and Technology Plan Project, China (Grant No.2012b01010036) （批准号：S2012020010885）
