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http://dx.doi.org/10.5050/KSNVE.2015.25.6.399

Characterization of Axial Defects in Pipeline Using Torsional Guided Wave  

Kim, Young-Wann (Department of Mechanical Design Engineering at Chonnam National University)
Park, Kyung-Jo (Department of Mechanical Design Engineering at Chonnam National University)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.25, no.6, 2015 , pp. 399-405 More about this Journal
Abstract
In this work we use the mode decomposition technique employing chirplet transform, which is able to separate the individual modes from dispersive and multimodal waveform measured with the magnetostrictive sensor. The mode decomposition technique is also used to estimate the time-frequency centers and individual energies of the reflection, which would be used to locate and characterize axial defects. The arrival times of the separated modes are calculated and the axial defect lengths can be evaluated by using the estimated arrival time. Results from an experiment on a carbon steel pipe are presented and it is shown that the accurate and quantitative defect characterization could become enabled using the proposed technique.
Keywords
Mode Separation; Chirplet Transform; Torsional Mode; Axial Defect; Arrival Time;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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