On a rational approach to calculating the piezoelectric transducer damper. Part 1. Numerical simulation
Purpose of the work: To develop a universal computational model for a piezoelectric transducer with a complex-shaped damper which allows for evaluating damping efficiency of any damper configuration. Materials and methods: The damping efficiency was estimated through both computational and experimental methods. The computational approach used the finite element analysis technique, while the experimental evaluation involved direct measurements. Results: The process of creating a computational model in 3D space, which makes it possible to study the effectiveness of dampers of various shapes and configurations, is considered. A 3D model of piezoplastics with a damper in the form of a truncated cone is proposed. The issue of choosing the parameters of the finite element grid that are optimal in terms of the reliability of the results and the computing power involved is studied. The analysis of the influence of the grid size on the correctness of the obtained results is carried out. The angle of inclination of the cone damper forming is determined to be the most effective from the point of view of the minimum amplitude of the parasitic signal by comparative analysis of the results obtained by 2D modeling, 3D modeling and field experiment. Conclusion: A computational model of a piezoelectric transducer having a damping element in the form of a truncated cone in three-dimensional space is provided. The influence of the maximum size of the finite element mesh is determined by comparing the results with those obtained from two-dimensional modeling and field analysis. The minimum required mesh size is also determined. A satisfactory level of consistency between the results obtained through different methods is observed.
Authors: M. S. Vechera, S. I. Konovalov, R. S. Konovalov, V. V. Shemetova, V. M. Tsaplev
Direction: Physics
Keywords: non-destructive testing, piezoelectric transducer, damper, modeling, finite element method
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