Open AccessPhononic crystal multi-channel low-frequency filter based on locally resonant unit
Author(s) -
Cong Chen,
Fugen Wu,
Xin Zhang,
Yao Yuan-Wei
Publication year - 2014
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.63.024301
Subject(s) - acoustics , waveguide , materials science , resonance (particle physics) , crystal (programming language) , stopband , low frequency , filter (signal processing) , optics , physics , band pass filter , computer science , programming language , particle physics , astronomy , computer vision
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.