Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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Identification of Reflection Coefficients for Overground Pipes Using Finite Element Method

유한요소법을 이용한 지상 파이프 반사계수 규명

  • 김영환 (전남대학교 기계자동차공학부) ;
  • 박경조 (전남대학교 기계자동차공학부) ;
  • 강우석 (전남대학교 기계시스템공학부 대학원)
  • Received : 2010.11.29
  • Accepted : 2011.04.12
  • Published : 2011.06.30
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Abstract

In this study, the reflection of the L(0,2), axially symmetric guided elastic wave from defects in pipes above ground is examined using finite element method. Phase and group velocity dispersion curves for the pipe were presented for the selection of the excitation mode. Some simple signal processing was applied to determine the amplitude of each of the reflected waves and to calculate the reflection coefficient. The results show the reflection coefficient of this mode is very close to a linear function of the circumferential extent of the defect. The motivation for the work was the development of a technique for inspecting chemical plant pipelines, but the study addresses the nature of the reflection function and its general applicability.

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References

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Cited by

  1. Effect of Inclination Angle on Reflection Signal from Defects in Pipes vol.22, pp.3, 2018, https://doi.org/10.9726/kspse.2018.22.3.066