Application of the finite element method to modelling transducer bars

Author

Assaad, Jamal ; Bruneel, C. ; Rouvaen, J.-M.

Author_Institution

OAE Dept., Valenciennes Univ.

fYear

1993

fDate

31 Oct-3 Nov 1993

Firstpage

839

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1993. Proceedings., IEEE 1993

Conference_Location

Baltimore, MD

Print_ISBN

0-7803-2012-3

Type

conf

DOI

10.1109/ULTSYM.1993.339454

Filename

339454