Ultrasonic flexural torsional guided wave properties, including the excitation and propagation have been studied recently. Natural focusing is one of the major characteristics exhibited by partial loading excitation. With the aid of phased array transducer we propose a wave focusing method to enhance the signal to noise ratio and defect resolution in pipe inspection. With time delays and amplitudes applied to different elements constructive wave interference at specific point can be achieved in order to focus wave energy. Focusing effect is examined by angular profile, which is the circumferential displacement distribution.
- Pressure Vessels and Piping Division
Ultrasonic Flexural Torsional Guided Wave Focusing in Pipe
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Sun, Z, & Rose, JL. "Ultrasonic Flexural Torsional Guided Wave Focusing in Pipe." Proceedings of the ASME/JSME 2004 Pressure Vessels and Piping Conference. Recent Advances in Nondestructive Evaluation Techniques for Material Science and Industries. San Diego, California, USA. July 25–29, 2004. pp. 53-57. ASME. https://doi.org/10.1115/PVP2004-2814
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