Design and experiment of ultrasonic longitudinal-flexural resonance transducer based on Mindlin theory

FU Junfan1,QIN Huibin1,LV Ming2

Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (7) : 259-266.

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PDF(1592 KB)
Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (7) : 259-266.

Design and experiment of ultrasonic longitudinal-flexural resonance transducer based on Mindlin theory

  • FU Junfan1,QIN Huibin1,LV Ming2
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Abstract

An ultrasonic longitudinal-flexural resonance transducer is consisted of a horn and a stepped annular plate with multi materials, and applied on ultrasonic machining and ultrasonic treatment. In order to design longitudinal-flexural resonance transducer with rapidness and accuracy, a design method for transducers was proposed with Mindlin theory. Based on Mindlin theory, formulae for displacement, rotation angle, bending moment, and shear force of moderately thick annular plates may be obtained. By continuous and boundary conditions among vibrating elements, vibration model and equations of longitudinal-flexural resonance transducer can be established. In view of the vibration model, a design software for the transducer is developed with Matlab/GUI. Two longitudinal-flexural resonance transducers were designed theoretically. Finite element analysis, impedance experiment and ultrasonic resonance experiment of the transducers were carried out. Results proved that resonance frequency of transducers designed by this design method was in a good agreement with design frequency. The design method showed high design accuracy, and can provide reference for transducer design.

Key words

Mindlin theory / longitudinal-flexural resonance / ultrasonic transducer / stepped annular plate

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FU Junfan1,QIN Huibin1,LV Ming2. Design and experiment of ultrasonic longitudinal-flexural resonance transducer based on Mindlin theory[J]. Journal of Vibration and Shock, 2018, 37(7): 259-266

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