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TECHNICAL PAPERS

Underwater Pipeline Inspection Using Guided Waves

[+] Author and Article Information
Won-Bae Na, Tribikram Kundu

Department of Civil Engineering and Engineering Mechanics, The University of Arizona, Tucson, AZ 85721

J. Pressure Vessel Technol 124(2), 196-200 (May 01, 2002) (5 pages) doi:10.1115/1.1466456 History: Received May 16, 2001; Revised December 18, 2001; Online May 01, 2002
Copyright © 2002 by ASME
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References

Figures

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Two types of transducer holders used in this research—(a) annular plexiglas holder, and (b) annular holder without plexiglas
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Aluminum pipe specimen—(a) defect free; (b) gouge; (c) removed metal (less); (d) removed metal (more); and (e) dent. All pipes have same length, outer radius, and inner radius.
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Schematic of experimental setup
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V(f) curves of the aluminum pipe with dent for different incident angles using transmitter-receiver arrangement, as shown in (a) Fig. 1(a), and (b) Fig. 1(b)
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The average values of V(f) curves of aluminum pipes for 20 deg transmitter angle for five different defects using transmitter receiver arrangement, as shown in Fig. 1(a)
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The average values of V(f) curves of aluminum pipes for 51 deg transmitter angle for five different defects using transmitter receiver arrangement, as shown in Fig. 1(b)
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The average values of V(f) curves of aluminum pipes for 51 deg transmitter angle for five different defects using transmitter receiver arrangement, as shown in Fig. 1(a)
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Phase velocity dispersion curves of the aluminum pipe in vacuum. Longitudinal, 1st, 2nd, and 3rd flexural wave modes are shown. Solid squares and circles correspond to the peak positions of the V(f) curves for 51 and 20 deg transmitter angles, respectively. Solid triangles correspond to peak positions of the V(f) curves for 31 deg transmitter angle 9.
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Phase velocity dispersion curves of the aluminum pipe in water. Longitudinal and 1st flexural wave modes are shown. Solid circles correspond to the peak positions of the V(f) curves for 51 deg transmitter angle.

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