Experimental verification of finite-difference model for ultrasonic evaluation of complex structures

Author

Chang, Hung-Wen ; D´angelo, R.M.

Author_Institution

Schlumberger-Doll Res., Ridgefield, CT, USA

fYear

1990

fDate

4-7 Dec 1990

Firstpage

965

Abstract

A numerical model which combines time-domain finite-difference scattering calculations with analytic propagation calculations was developed to simulate pulse echo responses of ultrasonic transducers inspecting complex structures. The accuracy and applicability of such a model were verified experimentally by comparing the simulated responses of an ideal, 2-D (finite-width, infinitely long) transducer against the measured waveforms. The experiment was a pulse-echo immersion (water) measurement. The transducer was rectangular, with an active region roughly 3 wavelengths wide (in water) and 30 wavelengths long, and was positioned between 10 and 20 wavelengths from the target structure

Keywords

difference equations; ultrasonic materials testing; analytic propagation calculations; complex structures; finite-difference model; numerical model; pulse echo immersion measurement; pulse echo responses; time-domain finite-difference scattering calculations; ultrasonic evaluation; ultrasonic transducers; water; waveforms; Analytical models; Computer interfaces; Finite difference methods; Numerical models; Pulse measurements; Scattering; Stress; Ultrasonic transducers; Ultrasonic variables measurement; Wavelength measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1990. Proceedings., IEEE 1990

Conference_Location

Honolulu, HI

Type

conf

DOI

10.1109/ULTSYM.1990.171506

Filename

171506