Title :
Thickness-shear and thickness-twist modes in an oblate elliptical ceramic cylinder and energy trapping in contoured acoustic wave resonators
Author :
Hui-jing He ; Jia-shi Yang ; Yi-Hua Huang
Author_Institution :
Dept. of Mech. & Mater. Eng., Univ. of Nebraska-Lincoln, Lincoln, NE, USA
Abstract :
We study shear-horizontal motions of a piezoelectric ceramic cylinder with an oblate elliptical cross section and axial poling. Exact thickness-shear and thickness-twist vibration modes are obtained. These modes show energy trapping, i.e., the vibration is mainly confined near the thick, central region and decays to almost nothing near the edges. The results are useful for the understanding and design of contoured piezoelectric resonators for strong energy trapping.
Keywords :
acoustic resonators; crystal resonators; piezoceramics; vibrations; axial poling; contoured acoustic wave resonators; contoured piezoelectric resonator design; energy trapping; oblate elliptical ceramic cylinder; oblate elliptical cross-section; piezoelectric ceramic cylinder; shear-horizontal motions; thickness-shear vibration modes; thickness-twist vibration modes; Acoustic waves; Ceramics; Charge carrier processes; Electric fields; Equations; Strain; Vibrations; Elliptic; Energy trapping; Resonator;
Conference_Titel :
Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA), 2012 Symposium on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4673-4814-0
DOI :
10.1109/SPAWDA.2012.6464110
