한국생산제조학회지 (Journal of the Korean Society of Manufacturing Technology Engineers)

  • 제20권2호
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  • Pages.139-144
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  • 2011
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  • 2508-5093(pISSN)
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  • 2508-5107(eISSN)
한국생산제조학회 (The Korean Society of Manufacturing Technology Engineers)
권호 표지

역 문제에 의한 파이프의 결함위치 평가

Estimation of Defect Position on the Pipe Line by Inverse Problem

  • 박성완 (인천대학교 기계시스템공학부)
  • 투고 : 2010.11.02
  • 심사 : 2011.01.19
  • 발행 : 2011.04.15
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초록

This paper presents a boundary element application to determine the optimal impressed current densities at defect position on the pipe line. In this protection paint, enough current must be impressed to lower the potential distribution on the metal surface to the critical values. The optimal impressed current densities are determined in order to minimize the power supply for protection. This inverse problem was formulated by employing the boundary element method. Since the system of linear equations obtained was ill-conditioned, including singular value decomposition, conjugate gradient method were applied and the accuracies of these estimation. Several numerical examples are presented to demonstrate the practical applicability of the proposed method.

키워드

참고문헌

  1. Waber, J. T., and Rosenbluth, M., 1955, "Mathematical Sutudies of Galvanic Corrosion 2," J. Electrochem. Soc., Vol. 102, pp. 344-353. https://doi.org/10.1149/1.2430058
  2. Doig, P., and Flewitt, P. E. J., 1979, "A Finite Difference Numerical Analysis of Galvanic Corrosion for Semi Infinite Linear Coplanar Electrodes," J. Electrochem. Soc., Vol. 126, pp. 2057-2063. https://doi.org/10.1149/1.2128861
  3. Kasper, R. G., and April, M. G., 1983, "Electro Galvanic Finite Element Analysis of Partially Protected Maline Structures," Corrosion-NACE, Vol. 39, pp.181-188. https://doi.org/10.5006/1.3580834
  4. Fu, J. W, 1982, "A Finite Element Analysis of corrosion Cells," Corrosion-NACE, Vol. 38, pp. 295-296. https://doi.org/10.5006/1.3578221
  5. Fu, J. W., and Chow, J. S. K., 1982, "Cathodic Protection Design Using an Integral Equation Numerical Method," Material Performance, pp. 9-12.
  6. Bardal, E., Johnsen, R., and Gartland, P. O., 1984, "Prediction of Galvanic Corrosion Rates and Distribution by Means of Calculation and Experimental Models," Corrosion-NACE, Vol. 40, pp. 628-633. https://doi.org/10.5006/1.3593898
  7. Aoki, S., Kishimoto, K., and Sakata, M., 1985, "Boundary Element Analysis of Galvanic Corrosion," Boundary Elements VII, 1-63.
  8. Telles. J. C. F., andWrobel. L. C., 1985, "Boundary Element Analysis for Cathodic Protection Problems," Boundary Elements VII, 1-73-83.
  9. Cherry, B. W., Foo, M., and Siauw, T. H., 1986, "BEM Analysis of the Potential Field Associated with a Corroding Electrode," Corrosion-NACE, Vol. 42, pp. 654-662. https://doi.org/10.5006/1.3583037
  10. Cirognani, P., and Gasparoni, F., 1990, "Application of the BEM to Offshore Cathodic Protection Modeling," J. Electrochem. Soc., Vol. 137, pp.1689-1696. https://doi.org/10.1149/1.2086771
  11. Zamani, N. G., 1988, "Boundary Element Simulation of the Cathodic Protection System," Appl. Math. Computer, Vol. 26, No. 2, pp. 119-123. https://doi.org/10.1016/0096-3003(88)90046-X
  12. Zamani, N. G., and Chuang, J. M., 1987, "BEM Simulation of Cathodic Protection Systems Employed in Infinite Electrolytes," Int. J. Number. Methods Eng. Vol. 24, No. 3, pp.605-620. https://doi.org/10.1002/nme.1620240310
  13. Fontana, M. G., and Greene, N. D., 1983, Corrosion Engineering, McGraw-Hill, New York, pp.12-20,
  14. Brebbia, C. A., Telles, J. F., and Wrobel, L. C., 1984, Boundary Element Techniques, Springer-Verlag, Berlin, pp.35-44.
  15. Hartmann, F., 1989, Introduction to Boundary Elements, Springer-Verlag, Berlin, pp.77-90.
  16. Hall, W, S., 1994, The Boundary Element Method, Kluwer Academic, Dordrecht, pp.62-82.
  17. Arora, S. Jasbir, 1989, Introduction to Optimum Design, McGraw-Hill, New York, pp. 408-430.
  18. Park, S. O., 1994, "A Study for Mutual Interference between Circular Inclusion and Crack in Finite-Width Plate by Boundary Element Method," Transaction of KSME, Vol. 18, No. 6, pp. 1474-1482.
  19. Park, S. O., 2001, "Analysis of Spiral Bevel Gear by Inverse Problem," Transaction of KSMTE, Vol. 10, No. 5, pp. 85-95.
  20. Park, S. O., 2003, "Analysis of Torque on Spur Gear by Inverse Problem," Transaction of KSMTE, Vol. 12, No. 5, pp. 24-33.
  21. Park, S, O., 2004, "Fatigue Life Prediction of FRP Composites under Uniaxial Tension and Pure Torsion Loadings," Transaction of KSMTE, Vol. 13, No. 6,
  22. Park, S, O., 2005, "Analysis for Strength Estimation of Adhesive Joints," Transaction of KSMTE, Vol. 14, No. 5, pp. 62-73.
  23. Park, S, O., 2008, "Evaluation of Stress Intensity Factor using Boundary Element Alternating Method," Journal of the Korean Soc. of Mechanical Technology. Vol. 10, No. 2, pp. 1-8.
  24. Park, S, O., 2009, "Analysis for Estimated with Strength of Adhesive Joints using Ductile Adhesives," Journal of the Korean Soc. of Mechanical Technology. Vol. 11, No. 2, pp. 23-32. https://doi.org/10.17958/ksmt.11.2.200906.23
  25. Park, S, O., 2010, "Analysis for Strength Estimation of Adhesive Joints using Brittle Adhesives," Journal of the Korean Soc. of Mechanical Technology. Vol. 12, No. 2, pp. 1-8.