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Three-Dimensional Numerical Simulation of Immersion Diffraction Sound Field Characteristics for Low Thicknesses Pipe Ring Weld
Abstract:
The numerical simulation of immersion TOFD (I-TOFD) detection for low thicknesses pipe ring weld was performed by Ultrasonic simulation software Wave 3000. The author get the sound field characteristics of diffraction wave through setting eight receivers in receiving area, thus determine the strongest diffraction wave energy range between 50°~60°.In the simulation, the author found that the longitudinal wave inspired by source after refraction in water-steel interface, continue to spread along under the surface of water-steel interface, and then the wave go back to the water again. We call the wave as the lateral wave of I-TOFD. So the defects can be determined according to the lateral wave and the bottom echo wave. The result of numerical simulation verified the feasibility of using I-TOFD method in detecting low thicknesses pipe ring weld in theory.
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Pages:
831-834
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Online since:
January 2015
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