Design and finite element simulation of an ultrasonic transducer of two piezoelectric discs

Abstract

Abstract. With the developing of ultrasound technology and expending of it's application scope, new requirements for the structure and the energy radiation of the transducer are presented. A reasonable design and manufacture of the transducer ensures that the energy can be transmitted with minimal loss. Based on the longitudinal vibration equation, a sandwich piezoelectric transducer which can be used in the field of precision machining, medical and other fields is designed and simulated in this paper. Different from the ordinary transducer, the front cover of this transducer is also a horn which can amplify the output amplitude compared to an equal section circular bar. ANSYS15.0 is used to calculate and analyze the transducer model with using HyperMesh (HM) software to generate the mesh to ensure the quality of the mesh. The finite element analysis software can calculate the transducer modal and harmonic response, and the results can be used to compare with theoretical design. The design frequency of the transducer is 20 kHz, the error between the simulation and the theoretical value is less than five percent, the result obtained by ANSYS is very close to the theoretical design.

Vibration analysis of 28 kHz horn transducer for ultrasonic cleaning based on harmonic response analysis

“…The simulation results show the maximum A of 5.19 m at f 0 of 28,250 Hz. The A increased with increasing the position in the z-axis, confirming the reported in [6], which applied the modal analysis to study only front mass vibration at 19 kHz HT. As expected, the front mass had more excellent A than the back mass.…”

“…The HT generally consists of front mass, piezoelectric material, and back mass. Most of the relevant research focused on the investigation of mode shapes of the front mass based on modal analysis to improve the efficacy for applying in drilling [ 1,2] , cutting [ 3,4] , lathing [ 5] , medical applications [ 6] , and cleaning [7][8][9][10][11] . However, the modal analysis provided the vibration with limited practical application since it emphasizes the front mass while both piezoelectric (PZT) material and back mass parts were ignored.…”

“…Therefore, the precise vibration analysis results should be included in the piezoelectric and back mass parts. In addition, harmonic response analysis (HRA) should be employed to achieve accurate results corresponding to the experiments and actual usages [6][7][8][9][10][11][12].…”

Harmonic Response Analysis of Tank Design Effect on Ultrasonic Cleaning Process

“…In the solid/fluid interface. {u} is calculated using (3). p} are the first and second derivatives of nodal acoustic pressure, respectively.…”

“…FEA to develop the transducer and tank body impacting the industries can be exemplified as follows. The structural analysis [1,2], modal analysis [3][4][5][6], and harmonic response analysis (HRA) [6] were employed to investigate stress, deformation, and related results for optimizing the design of front masses for transducers to suit usages. Furthermore, since the transducer consists of front mass, piezoelectric (PZT) material, and back mass, the PZT is also studied and developed for many purposes [7].…”