Finite element method (FEM) and impulse response method (IRM) analysis of circular ultrasonic transducers

摘要

Circular transducers with axially-symmetric vibrational profiles were considered. Vibra- tional patterns of transducer structures were calculated using he finite Element Method. Analytical formulas for the impulse response function h (X, t) for circular transducers and Vibration velocity profiles, approximated by linear and quadratic polynomials, on the finite Element (annulus) were established. These formulas enable accurate calculations of acous- Tic field distributions in near and far-field, respectively. Calculated profiles of an acoustic Field were compared with the experimental data.