Title :
Study on the bandgaps of two-dimensional vacuum/solid phononic crystals with Helmholtz resonators
Author :
Ke, Jiao ; Wang, Yan-Feng ; Wang, Yue-Sheng
Author_Institution :
Inst. of Eng. Mech., Beijing Jiaotong Univ., Beijing, China
Abstract :
In this paper, we present a type of vacuum/solid phononic crystal composed of two-dimensional Helmholtz resonators, which is called Helmholtz resonant phononic crystals. By using the finite element method, bandgaps and vibration modes are studied. The numerical computation is performed by Comsol Multiphysics 3.5a. The results show that complete resonant bandgaps exist for the Helmholtz resonant phononic crystals, and also a lower full bandgap appears for the mixed mode. The results are related to optimization of the acoustic bandgaps.
Keywords :
Brillouin zones; Helmholtz equations; energy gap; finite element analysis; phononic crystals; vibrational modes; Helmholtz resonators; acoustic band gaps; finite element method; numerical computation; two-dimensional vacuum-solid phononic crystals; vibration modes; Crystals; Finite element methods; Mathematical model; Photonic band gap; Solids; Vectors; Vibrations; Helmholtz resonant phononic crystals; bandgap; finite element method; vibration mode;
Conference_Titel :
Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA), 2011 Symposium on
Conference_Location :
Shenzhen
Print_ISBN :
978-1-4673-1075-8
DOI :
10.1109/SPAWDA.2011.6167254
