Power Ultrasonic Transducer The Radial Resonance Frequency Of Piezoelectric Vibrator And Acoustic Characteristics Analysis

The development of high power ultrasonic transducer is the key of tertiary oilrecovery technology, the design of the transducer is work stable performance, largetransmission power, however, transducer power capacity of sound pressure leveldepends on the performance of the piezoelectric vibrator, the paper focuses on theresonance frequency of the power ultrasonic transducer piezoelectric vibrator andacoustic characteristics analysis, the manufacture of high power ultrasonic transducerand the fields of tertiary oil recovery of great significance.Firstly，through the piezoelectric equation and motion equation, get the radialresonance frequency equation of piezoelectric vibrator, by calculating radial resonancefrequency of piezoelectric vibrator.Secondly, according to the stainless steel tube and the thermal expansioncoefficient of the piezoelectric circular tube, composite pipe of the piezoelectric vibratoris established, and the composite piezoelectric circular tube interference is deducedtheory formula of calculating complex piezoelectric vibrator over surplus quantity of thetheoretical value.Thirdly, through the ANSYS software, the piezoelectric vibrator and compositepiezoelectric vibrator modal and harmonic response analysis, and analysis of thepiezoelectric vibrator radial resonance frequency and the size of the relationship, andthe piezoelectric vibrator is measured through experiments, finally combined withtheoretical, simulation and experiment are compared and validated.Finally, through on the acoustic characteristics of the piezoelectric vibrator in thewater in finite element simulation, analysis of the radial resonance frequency ofpiezoelectric vibrator in the water, and get the admittance characteristics of soundpressure level and the most high power capacity.In conclusion，through on the piezoelectric vibrator of the ultrasonic wavetransducer radial resonance frequency and acoustic characteristics analysis, verify thedesign requirements of high power ultrasonic transducer, and at the same time for theoptimization of transducer and the design provides a new way of thinking. Ultimatelycontribute to the field of tertiary oil recovery.