Title :
Application of the finite element method to modelling transducer bars
Author :
Assaad, Jamal ; Bruneel, C. ; Rouvaen, J.-M.
Author_Institution :
OAE Dept., Valenciennes Univ.
fDate :
31 Oct-3 Nov 1993
Abstract :
Lithium niobate (LiNbO3) bars are widely used in high frequency applications like ultrasonic imaging and non-destructive testing. However due to a strong material anisotropy, the modeling of such bar transducers, for the sake of optimisation, is quite difficult. This paper is focused on the two-dimensional modeling of LiNbO3 bars using the finite element method with the help of the ATILA code. Mode dispersion curves are displayed for the (YZw)36° cut. For this cut bar the in-water far-field directivity patterns are shown for several frequencies with width to thickness ratio (W/T) equal to 3.59
Keywords :
digital simulation; finite element analysis; piezoelectric transducers; ultrasonic dispersion; ultrasonic transducers; ATILA code; H2O; LiNbO3; LiNbO3 bars; YZ cut; far-field directivity patterns; finite element method; mode dispersion curves; transducer bars; two-dimensional modeling; water; Bars; Capacitive sensors; Finite element methods; Impedance measurement; Modal analysis; Near-field radiation pattern; Resonance; Resonant frequency; Ultrasonic transducers;
Conference_Titel :
Ultrasonics Symposium, 1993. Proceedings., IEEE 1993
Conference_Location :
Baltimore, MD
Print_ISBN :
0-7803-2012-3
DOI :
10.1109/ULTSYM.1993.339454
