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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 fined 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 1500mm) 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 predication because the extrapolation gives similar attenuation patterns between the numerical and experimental results.
목차
ABSTRACT
1. 서론
2. 수치해석
3. 모형실험
4. 결과 비교 및 신호강도 예측
5. 결론
참고문헌
참고문헌 (14)
참고문헌 신청
1. [학술지(정기간행물)] - Cho, Y. / 2001 / Understanding and Applications of Ultrasonic Guided Waves / Journal of the Korean Society for Nondestructive Testing 21 (4) : 446 ~ 460
2. [학술지(정기간행물)] - Essandoh-Yeddu, J. / 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
3. [학술지(정기간행물)] - Fratta, D. / 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. [학술지(정기간행물)] - Kwun, H. / 1995 / Feasibility of Under-lagging Corrosion Detection in Steel Pipe using the Magnetostrictive Sensor Technique / NDT&E International 28 : 211 ~ 214
5. [학술지(정기간행물)] - Kwun, H. / 2004 / Torsional Guided-Wave Attenuation in Coal-Tar-Enamel-Coated, Buried Piping / NDT&E International 37 : 663 ~ 665
2. [학술지(정기간행물)] - Essandoh-Yeddu, J. / 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
3. [학술지(정기간행물)] - Fratta, D. / 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. [학술지(정기간행물)] - Kwun, H. / 1995 / Feasibility of Under-lagging Corrosion Detection in Steel Pipe using the Magnetostrictive Sensor Technique / NDT&E International 28 : 211 ~ 214
5. [학술지(정기간행물)] - Kwun, H. / 2004 / Torsional Guided-Wave Attenuation in Coal-Tar-Enamel-Coated, Buried Piping / NDT&E International 37 : 663 ~ 665
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UCI(KEPA) : I410-ECN-0101-2014-559-000314326