Title :
Analysis of eigenfrequencies in piezoelectric transducers using the finite element method
Author_Institution :
Inst. of Manuf. Eng., Tech. Univ. of Denmark, Lyngby, Denmark
Abstract :
It is noted that the finite-element method is a valuable supplement to the traditional methods for design of novel transducer types because it can determine the vibrational pattern of piezoelectric transducers and is applicable to any geometry. Computer programs for analysis of axisymmetric transducers, which include the complete set of piezoelectric equations, have been included. They can find eigenfrequencies for undamped transducers and perform forced-response analysis for transducers with internal and radiation damping. The superelement technique is used to model the transducer backing in an efficient way. Examples ranging from a freely vibrating disk to a real focused transducer with a conical backing are presented
Keywords :
circuit CAD; eigenvalues and eigenfunctions; finite element analysis; piezoelectric transducers; axisymmetric transducers; computer programs; conical backing; eigenfrequencies; finite element method; focused transducer; forced-response analysis; freely vibrating disk; geometry; internal damping; piezoelectric equations; piezoelectric transducers; radiation damping; superelement technique; transducer backing; undamped transducers; vibrational pattern; Damping; Equations; Equivalent circuits; Finite element methods; Geometry; Interpolation; Manufacturing; Piezoelectric transducers; Shape; Tensile stress;
Conference_Titel :
Ultrasonics Symposium, 1988. Proceedings., IEEE 1988
Conference_Location :
Chicago, IL
DOI :
10.1109/ULTSYM.1988.49405