DOI QR코드

DOI QR Code

Attenuation Characterization of L(0,2) Guided Wave Mode through Numerical Analyses and Model Experiments with Buried Steel Pipe

수치해석과 모형실험을 통한 매립배관에서의 유도초음파 L(0,2) 모드의 감쇠 특성 평가

  • Received : 2012.09.03
  • Accepted : 2013.02.14
  • Published : 2013.02.28

Abstract

By carrying out numerical analyses and model experiments, this paper presents the attenuation characterization of an L(0,2) guided ultrasonic wave propagating in a buried steel pipe. From this investigation, we first find that the L(0,2) mode has a better attenuation property. Second, it is shown from the numerical analyses that the attenuation increases with increases in the soil embedment length (0, 500, 1000, and 1500 mm) and degrees of saturation (0, 50, 99, and 100%). Third, it is also shown from the model experiment that the attenuation increases as the embedment lengths and soil moisture quantities (0, 10, 20, and 30 kg) increase. Finally, we find that an exponential extrapolation gives a better attenuation prediction because the extrapolation gives similar attenuation patterns between the numerical and experimental results.

Keywords

Buried pipe inspection;Guided waves;Attenuation;DISPERSE;L(0,2) Mode

References

  1. Cho, Y., 2001. Understanding and Applications of Ultrasonic Guided Waves. Journal of the Korean Society for Nondestructive Testing, 21(4), 446-460.
  2. Essandoh-Yeddu, J., Gulen G., 2009. Economic Modeling of Carbon Dioxide Integrated Pipeline Network for Enhanced Oil Recovery and Geological Sequestration in the Texas Gulf Coast Region. Energy Procedia, 1, 1603-1610. https://doi.org/10.1016/j.egypro.2009.01.210
  3. Fratta, D., Alshibli, K.A., Tanner, W.M., Roussel, L., 2005. Combined TDR and P-wave Velocity Measurements for the Determination of In Situ Soil Density - Experimental Study. Geotechnical Testing Journal, 28(6), 1-11.
  4. Kwun, H., Holt, A.E., 1995. Feasibility of Under-lagging Corrosion Detection in Steel Pipe using the Magnetostrictive Sensor Technique. NDT&E International, 28, 211-214. https://doi.org/10.1016/0963-8695(95)00019-T
  5. Kwun, H., Kim, S.Y., Choi, M.S., 2004. Torsional Guided -Wave Attenuation in Coal-Tar-Enamel-Coated, Buried Piping. NDT&E International, 37, 663-665. https://doi.org/10.1016/j.ndteint.2004.05.003
  6. Lee, J., Na, W.B., Shin, S.W., Kim, J.M., 2010a, Effect of Surrounding Soil Properties on the Attenuation of the First Guided Longitudinal Wave Mode Propagating in Waterfilled, Buried Pipes. Journal of Ocean Engineering and Technology, 24(4), 32-37.
  7. Lee, J., Shin, S.W., Na, W.B., 2010b. Attenuation of Longitudinal Fundamental Guided Wave Mode in Steel Pipe Embedded in Soil. Journal of the Korean Society for Nondestructive Testing, 30(6), 539-547.
  8. Long, R., Lowe, M., Cawley, P., 2003. Attenuation Characteristics of the Fundamental Modes That Propagate in Buried Iron Water Pipes. Ultrasonics, 41, 509-519. https://doi.org/10.1016/S0041-624X(03)00166-5
  9. Lowe, M.J.S., 1995. Matrix Technique for Modelling Ultrasonic Waves in Multilayered Media. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 42(4), 525-542. https://doi.org/10.1109/58.393096
  10. Na, W.B., Ryu, Y.S., J.T. Kim, 2005. Attenuation of Fundamental Longitudinal Cylindrical Guided Wave Propagating in Liquid-Filled Steel Pipes. Journal of Ocean Engineering and Technology, 19(5), 26-33.
  11. Qian, X., Gray, D.H., Woods, R.D., 1993. Voids and Granulometry : Effects on Shear Modulus of Unsaturated Sands, ASCE Journal of Geotechnical Engineering, 119(2), 295-314. https://doi.org/10.1061/(ASCE)0733-9410(1993)119:2(295)
  12. Rose, J.L., 2004. Ultrasonic Waves in Solid Media. Cambridge University Press.
  13. Rose, J.L., Li, Z., Avioli, M., Mudge, P.J., 2005. A Natural Focusing Low Frequency Guided Wave Experiment for the Detection of Defects Beyond Elbows. ASME Journal of Pressure Vessel Technology, 127, 310-316. https://doi.org/10.1115/1.1989350
  14. Silk, M.G., Bainton, K.F., 1979. The Propagation in Metal Tubing of Ultrasonic Wave Modes Equivalent to Lamb Waves. Ultrasonics, 17, 11-19. https://doi.org/10.1016/0041-624X(79)90006-4

Acknowledgement

Supported by : 부경대학교