Title :
Band structures of 2-D sonic crystals with square lattices based finite element method
Author :
Wu, Bin ; Liu, Zong-fa ; He, Cun-fu
Author_Institution :
Coll. of Mech. Eng. & Appl. Electron. Technol., Beijing Univ. of Technol., Beijing, China
Abstract :
Sonic crystals are composite materials made of periodic distributions of inclusions embedded in a matrix. Due to the periodicity, these materials may exhibit complete acoustic band gaps within which sound and vibrations are forbidden. In this paper, the band gap characteristics of a 2-D square array of hollow cylinders and spit-ring hollow cylinders embedded in air are investigated by COMSOL® finite element method, and then verified by plane wave expansion method. The results are very consistent, proving that COMSOL® can be employed for the full characterization of the structures.
Keywords :
aluminium; composite materials; energy gap; finite element analysis; inclusions; shapes (structures); vibrations; 2D sonic crystals; 2D square array; Al; acoustic band gap; band structure; periodic inclusion distribution; plane wave expansion method; spit-ring hollow cylinders; square lattices-based finite element method; vibrations; Acoustic waves; Arrays; Crystals; Finite element methods; Frequency response; Photonic band gap; Band gap; COMSOL; PWE; Sonic crystal;
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.2011.6167302
