Finite element and experimental study of composite and 1D array transducers

摘要

Abstract: This paper reports a combined finite element and experimental study of composite and 1D array transducers. The main properties characterized are the electrical impedance and beam pattern. In order to calculate the beam pattern of a transducer immersed in water, the pressure distribution and the normal velocity at the interface of water and transducer were calculated by using ANSYS. These results were then input into the Helmholtz integral to calculate the beampattern. The impedance curve was obtained by performing harmonic analysis using ANSYS. Related experiments were also conducted to verify these calculated results, good agreement was achieved between the experiments and simulations. Because of the similarity between the structures of 2-2 composite and 1D array, the same FEA modeling procedure for 2-2 composites was extended to study a 1D array. Particularly, the cross talk level and directivity of each element in an array were studied. !13