Numerical simulations created with Computer Simulation Technology (CST) modeling are used to classify and evaluate the microwave signal (waveform) in order to determine whether various parameters of pipe wall thinning (PWT) can be identified. Microwaves are used to carry out the measurement of PWT in 9 CST simulations using three cross-sectional profiles, three lengths of PWT, and three depths of PWT, to determine whether there are differences in waveforms that can be used to distinguish the parameters of unknown discontinuities (PWT). The modeled system uses the pipe as a circular waveguide (bandwidth 0.486GHz) with sweeping frequencies from 1.914GHz to 2.4GHz. Waveforms are found to be distinguishable based on the three parameters modeled in the study. This research establishes the possibility of creating a nondestructive testing system with which PWT discontinuities might be characterized using microwaves in the S11 and S21 scattering parametrics. The waveforms generated for known series of PWT cases, once cataloged, can be used in the future to identify discontinuities in test pipes, and to determine their degree of similarity to the standardized waveforms via pattern recognition algorithms.
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ASME 2016 Pressure Vessels and Piping Conference
July 17–21, 2016
Vancouver, British Columbia, Canada
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-5041-1
PROCEEDINGS PAPER
Classification of the Extent of Wall Thinning in Pipes Based on Simulations in the Time and Frequency Domain
Wissam M. Alobaidi,
Wissam M. Alobaidi
University of Arkansas at Little Rock, Little Rock, AR
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Eric Sandgren
Eric Sandgren
University of Arkansas at Little Rock, Little Rock, AR
Search for other works by this author on:
Wissam M. Alobaidi
University of Arkansas at Little Rock, Little Rock, AR
Eric Sandgren
University of Arkansas at Little Rock, Little Rock, AR
Paper No:
PVP2016-63387, V005T10A005; 5 pages
Published Online:
December 1, 2016
Citation
Alobaidi, WM, & Sandgren, E. "Classification of the Extent of Wall Thinning in Pipes Based on Simulations in the Time and Frequency Domain." Proceedings of the ASME 2016 Pressure Vessels and Piping Conference. Volume 5: High-Pressure Technology; Rudy Scavuzzo Student Paper Symposium and 24th Annual Student Paper Competition; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); Electric Power Research Institute (EPRI) Creep Fatigue Workshop. Vancouver, British Columbia, Canada. July 17–21, 2016. V005T10A005. ASME. https://doi.org/10.1115/PVP2016-63387
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