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Investigations of the characteristics of an ultrasonic comb transducer have been performed for a range of transducer parameters.A numerical model-providing a time domain wave propagation solution for the field generated by a transducer on an elastic plate is presented. The ability of mode selection and isolation is demonstrated, which is of practical significance in NDE.

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An exact analytical solution for a three-dimensional case of the vibration of an infinite orthotropic plate loaded on its upper boundary is considered. The influence of source parameters on the characteristics of wave propagation in an orthotropic elastic infinite plate are analyzed. An asymptotic approximation for evaluating displacement in the far field is developed. Sample numerical calculation results are presented for various source parameters.