The Formulas of an Acoustic Far Field Zone Channel of an Angle Beam Probe for an Angle Reflectors Such as a Vertical Cylindrical Angle Reflector and a Short Vertical Drilled Hole

Problem of an identification of cracks in dents or corrosion damage, which is considered as a crack – like corrosion – mechanical defect type, is considered for acoustic in – line inspection tools during an in – line inspection of oil pipelines. For this purpose, a theoretical model has been provided and considered as a vertical notch with a convex base. For modeling an interaction of acoustic waves with the defect model there has been used a corresponded formula of an acoustic equation at a ray – acoustic approximation. Considering used simplifying assumptions there have obtained certain boundary conditions for acoustic equation of the crack – like corrosion mechanical defect. Based on this theoretical model here an experimental research were provided at specially manufactured test specimen which contained vertical notches with base of different curvature. At the specimen there are has been obtained a difference of echo signals amplitude from convex and flat surface based notches. Obtained results showed a sufficient agreement with provided by theoretical modeling and approve an adequacy of the proposed model for a theoretical description of considered interaction shear waves with the defect imitation. According to obtained trend of an echo – signal amplitude variation a method for identification of cracks in dents or corrosion damage during an oil pipeline inspection by inline inspection tools has been provided.

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The Formulas of an Acoustic Far Field Zone Channel of an Angle Beam Probe for an Angle Reflectors Such as a Vertical Cylindrical Angle Reflector and a Short Vertical Drilled Hole

Cited by 3 publications

References 0 publications

Calculating Acoustic Channel for a Crack-Like Corrosion–Mechanical Defect

Calculating Acoustic Channel for a Crack-Like Corrosion–Mechanical Defect

To the Question of Assessing the Sensitivity of Ultrasonic Testing of Welded Joints of Energy Industry Objects

The Research for an Identification of Crack – Like Corrosion – Mechanical Defect by Acoustic in-Line Inspection Tools

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