论文信息 - Numerical analysis of the radiated fields of ultrasonic transducers

Numerical analysis of the radiated fields of ultrasonic transducers

A finite element model is implemented for simulating the radiated fields of both planar and curved transducers in acoustic media. The approach is based on general finite element analysis developed for solving the governing equations of elastic wave propagation. The distributions of the wave fields are presented for both the nearfield and farfield regions of the transducer. Three excitation pulses with the same center frequency but different bandwidths are examined and the accuracy is indicated by a comparison of the simulation results for the axial and transverse fields with the analytical results for continuous wave excitation.

W. Lord | T. Xue | S. Udpa

[1] W. Lord,et al. Numerical simulation of ultrasonic wave propagation in anisotropic and attenuative solid materials , 1991, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[2] B. Auld,et al. Acoustic fields and waves in solids , 1973 .

[3] W. Lord,et al. A finite-element formulation for the study of ultrasonic NDT systems , 1988, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[4] José Luis San Emeterio,et al. Diffraction impulse response of rectangular transducers , 1992 .

[5] E. Papadakis. Ultrasonic Diffraction Loss and Phase Change in Anisotropic Materials , 1966 .

[6] E. Papadakis. Diffraction of Ultrasound Radiating into an Elastically Anisotropic Medium , 1964 .

[7] W. Beaver. Sonic nearfields of a pulsed piston radiator , 1974 .

[8] H. Seki,et al. Diffraction Effects in the Ultrasonic Field of a Piston Source and Their Importance in the Accurate Measurement of Attenuation , 1956 .

[9] L. Rayleigh,et al. The theory of sound , 1894 .

[10] P. Stepanishen. Transient Radiation from Pistons in an Infinite Planar Baffle , 1970 .

[11] W. Lord,et al. Developments in ultrasonic modeling with finite element analysis , 1990 .

[12] D. Hutchins,et al. Radiated Fields of Ultrasonic Transducers , 1990 .