Browse > Article
http://dx.doi.org/10.5050/KSNVN.2008.18.12.1286

Monitoring Pipe Thinning Using Two Accelerometers  

Choi, Young-Chul (한국원자력연구원)
Park, Jin-Ho (한국원자력연구원)
Yoon, Doo-Byung (한국원자력연구원)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.18, no.12, 2008 , pp. 1286-1292 More about this Journal
Abstract
In this paper, we estimated the degree of pipe thinning by using two accelerometers. It uses measured velocity of flexural wave traveling along the pipes. If the thickness of the wall decreases because of pipe thinning, flexural stiffness of the pipes decreases and accordingly, traveling velocity of flexural wave decreases. Thus, if we install two vibration sensors outside of the pipes and measures traveling velocity of flexural waves regularly, we can estimate and monitor the degree of pipe thinning quickly. In order to test the method we experimented with pipes, and get the result that group velocity varies according to the degree of pipe thinning. It verified this method can be used to monitor the pipe thinning.
Keywords
Pipe Thinning; Accelerometer; Group Velocity; Time-frequency Analysis;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 Jeong, T.-G., 2006, 'Study on the Nonstationary Behavior of Slider Air Bearing Using Reassigned Time-frequency Analysis,' Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 16, No. 3, pp. 255-262   과학기술학회마을   DOI   ScienceOn
2 Cremer, L. and Heckl, M., 1998, 'Structure-borne Sound,' Springer-Verlag Berlin Heidelberg New York London Paris Tokyo, pp. 101
3 Viktorov, I. A., 1967, 'Rayleigh and Lamb Waves,' Plenum press, pp. 67-102
4 Donald, R., 1987, 'Mechanics of Underwater Noise,' Peninsula Publising Los Altos, California, p. 159
5 Combes, J. M., Grossman, A. and Tchamitchian, P., Eds. 1989, 'Wavelets, Time-Frequency Methods, and Phase Space,' Berlin: Springer
6 Cragnolino, G., Czajkowski, C. and Shack, W. J., 1998, 'Review of Erosion-corrosion in Singlephase Flows,' NUREG/CR-5156, U.S. Nuclear Regulatory Commission
7 Bindi, C., et al., 1996, 'Flow-accelerated Corrosion in Power Plants,' EPRI TR-106611, Electric Power Research Institute
8 Park, Y.-K. and Kim, Y.-H., 1997, 'Wigner- Ville Distribution Applying the Rotating Window and Its Characteristics,' Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 7, No. 5, pp. 747-756
9 Ting, K. and Ma, Y. P., 1999, 'The Evaluation of Erosion/corrosion Problems of Carbon Steel Piping in Taiwan PWR Nuclear Power Plant,' Nuc. Eng. Design, Vol. 191, pp. 231-243   DOI   ScienceOn
10 Sohn, C. H., Choi, Y.-C., Park, J. H. and Chong, U. P., 2006, 'Monitoring Pipe Thinning Using Time-frequency Analysis,' Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 6, No. 12, pp. 747-756   과학기술학회마을   DOI   ScienceOn
11 Ryu, K. H., Lee, N. Y. and Hwang, I. S., 2007, 'A Study on the Equipotent Switching Direct Current Potential Drop Method for the Monitoring of Piping Thinning,' Key Engineering Materials Vols. 345-346, pp. 1331-1334
12 Lister, D. H. and Lang, L. C., 2002, 'A Mechanistic Model for Predicting Flow-assisted and General Corrosion of Carbon Steel in Reactor Primary Coolants,' Proc. Int. Conf. Water Chemistry in Nuclear Reactors Systems, SFEN, Avignon, France
13 Keun J. Sun and Dorron Kishoni, 1993, 'Feasibility of Using Lamb Waves for Corrosion Detection in Layered Aluminum Aircraft Structures,' IEEE Ultrasonic Syposium
14 Sohn, C. H., Choi, Y.-C., Park, J. H. and Chong, U. P., 2006, 'Measuring Young's Modulus of Materials by Using Accelerometers,' Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 6, No. 11, pp. 1142-1164
15 Park, Y.-K. and Kim, Y.-H., 1997, 'A Method to Reduce the Cross-talk of Wigner-Ville Distribution; Rotating Window,' Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 7, No. 2, pp. 319-329   과학기술학회마을