Calculation of Echo Signals from a Flat-Bottom Hole for Normal Probes

摘要

On the basis of the earlier developed method for determining the echo-signal amplitude from a flat-bottom-hole flaw via the use of the Kirchhoff approximation for constructing DGS diagrams, sig-nals are calculated at an arbitrary arrangement of identical normal circular transducers on the tested sur-face parallel to the surface of the hole. Expressions for the pressure of a reflected longitudinal wave on the receiving transducer are obtained in a scalar approximation and in a general case. Examples of numerical estimates of the echo-signal amplitudes are presented.