Title :
Lamb wave in phononic crystal thin plates: Truncated plane parallets to the axis of periodictiy
Author :
Chen, Jiu-jiu ; Han, Xu
Author_Institution :
State Key Lab. of Adv. Design & Manuf. for Vehicle Body, Hunan Univ., Changsha, China
Abstract :
A theoretical study is presented on the propagation properties of Lamb wave modes in thin plates consisting of a row of parallel square cylinders placed periodically in the host material. The surfaces of the plates are parallel to the axis of periodicity. The dispersion curves of the Lamb wave modes are calculated based on the supercell method. Finite element method is employed to calculate the transmitted power spectrum, which is in good agreement with the results obtained by the supercell method. The influence of the filling fraction on the band gaps of the Lamb wave modes is analyzed by numerical simulations.
Keywords :
dispersion relations; energy gap; phononic crystals; shapes (structures); surface acoustic waves; Lamb wave; band gap; dispersion curves; filling fraction; finite element method; parallel square cylinders; periodicity axis; phononic crystal thin plate; supercell method; transmitted power spectrum; truncated plane parallets; Acoustic applications; Acoustic waves; Crystals; Finite element methods; Fourier series; Frequency; Lattices; Personal communication networks; Photonic band gap; Vehicles; Lamb waves; Phononic crystals; band gaps;
Conference_Titel :
Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA) and 2009 China Symposium on Frequency Control Technology, Joint Conference of the 2009 Symposium on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-4950-7
DOI :
10.1109/SPAWDA.2009.5428926
