Browse > Article
http://dx.doi.org/10.5050/KSNVE.2013.23.3.249

Synthetic Phase Tuning Technique for the Transduction of a Specific Ultrasonic Torsional Mode in a Pipe  

Kim, Hoe Woong (Fast Reactor Technology Demonstration Division, Korea Atomic Energy Research Institute)
Kwon, Young Eui (School of Mechanical and Aerospace Engineering, Seoul National University)
Joo, Young Sang (Fast Reactor Technology Demonstration Division, Korea Atomic Energy Research Institute)
Kim, Jong Bum (Fast Reactor Technology Demonstration Division, Korea Atomic Energy Research Institute)
Kim, Yoon Young (School of Mechanical and Aerospace Engineering, Seoul National University)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.23, no.3, 2013 , pp. 249-257 More about this Journal
Abstract
This study newly presents a synthetic phase tuning technique to suppress the unwanted torsional mode while enhancing the desired torsional mode in a pipe. Specifically, we aim at the enhancement of the first torsional mode and the suppression of the undesired, second torsional mode. Earlier efforts were to enhance the desired wave mode only in the hope that the enhancement results in the suppression of the unwanted wave mode. Unlike these efforts, the suggested technique makes the complete cancellation of the unwanted wave mode but it is shown to enhance the desired first mode for torsional wave problems. In the present study, the synthetic phase tuning is developed for the cancellation of the unwanted wave mode, meaning that the number of necessary experimental equipments is reduced. Simulation and experiment were carried out to check the effectiveness of the proposed method. As an application of the suggested technique, we investigated the reflection and mode conversion characteristics of the first torsional mode according to the step thickness variation in a stepped pipe.
Keywords
Synthetic Phase Tuning; Guided Torsional Wave; Higher Torsional Mode; agnetostrictive Patch Transducer;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Ditri, J. J., 1994, Utilization of Guided Elastic Waves for the Characterization of Circumferential Cracks in Hollow Cylinders, Journal of the Acoustical Society of America, Vol. 96, No. 6, pp. 3769-3775.   DOI   ScienceOn
2 Lowe, M. J. S., Alleyne, D. N. and Cawley, P., 1998, Defect Detection in Pipes Using Guided Waves, Ultrasonics, Vol. 36, No. 1-5, pp. 147-154.   DOI   ScienceOn
3 Demma, A., Cawley, P., Lowe, M., Roosenbrand, A. G. and Pavlakovic, B., 2004, The Reflection of Guided Waves from Notches in Pipes: A Guide for Interpreting Corrosion Measurements, NDT & E International, Vol. 37, No. 3, pp. 167-180.   DOI   ScienceOn
4 Graff, K. F., 1991, Wave Motion in Elastic Solids, Dover Publications, NewYork.
5 Rose, J. L., Pelts, S. P. and Quarry, M. J., 1998, A Comb Transducer Model for Guided Wave NDE, Ultrasonics, Vol. 36, No. 1-5, pp. 163-169.   DOI   ScienceOn
6 Hay, T. R. and Rose, J. L., 2002, Flexible PVDF Comb Transducers for Excitation of Axisymmetric Guided Waves in Pipe, Sensors and Actuators, A, Vol. 100, No. 1, pp. 18-23.   DOI   ScienceOn
7 Li, J. and Rose, J. L., 2001, Implementing Guided Wave Mode Control by Use of a Phased Transducer Array, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Vol. 48, No. 3, pp. 761-768.   DOI   ScienceOn
8 Cawley, P., Alleyne, D. N. and Chan, C. W., 2000, Inspection of Pipes, U.S. Patent 6148672.
9 Alleyne, D. N., Pavlakovic, B., Lowe, M. J. S. and Cawley, P., 2001, Rapid Long-range Inspection of Chemical Plant Pipework Using Guided Waves, Insight, Vol. 43, No. 2, pp. 93-96.
10 Kim, H. W., Kwon, Y. E., Lee, J. K. and Kim, Y. Y., Higher Torsional Mode Suppression in a Pipe for Enhancing the First Torsional Mode by Using Magnetostrictive Patch Transducers, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control(accepted).
11 Wooh, S. and Shi, Y., 2001, Synthetic Phase Tuning of Guided Waves, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Vol. 48, No. 1, pp. 209-223.   DOI   ScienceOn
12 Pavlakovic, B. and Lowe, M., 2003, Disperse User Manual: a System for Generating Dispersion Curves, Imperial College, University of London.
13 Comsol Muliphysics, COMSOL Multiphysics Modeling Guide : Version3.5 (COMSOLAB, Stockholm, 2008).
14 Kwun, H., Kim, S. Y. and Crane, J. F., 2002, Method and Apparatus Generating and Detecting Torsional Wave Inspection of Pipes or Tubes, U.S. Patent 6429650.
15 Kim, Y. Y., Park, C. I., Han, S. W. and Cho, S. H., 2004, The Generation of Torsional Waves and the Pipe Diagnosis Using Magnetostrictive Transducers, Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 14, No. 2, pp. 144-149.   과학기술학회마을   DOI   ScienceOn
16 Kannan, E., Maxfield, B. W. and Balasubramaniam, K., 2007, SHM of Pipes Using Torsional Waves Generated by in Situ Magnetostrictive Tapes, Smart Materials and Structures, Vol. 16, No. 6, pp. 2505-2515.   DOI   ScienceOn
17 Jiles, D. C., 1995, Theory of the Magnetomechanical Effect, Journal of Physics D: Applied Physics, Vol. 28, No. 8, pp. 1537-1546.   DOI   ScienceOn
18 Thompson, R. B., 1979, Generation of Horizontally Polarized Shear Waves in Ferromagnetic Materials Using Magnetostrictively Coupled Meander-coil Electromagnetic Transducers, Applied Physics Letters, Vol. 34, No. 2, pp. 175-177.   DOI
19 Carpenter Technology Corp. (2012, Nov. 30) $Hiperco^{(R)}$ 50HS Alloy. [Online]. Available: http://www.cartech.com/ssalloysprod.aspx?id=2492