Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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Analysis on the Likelihood of Axisymmetric Wave Propagation in Buried Water Pipes

지하매설 배관의 축대칭 파동 전파 가능성 해석

  • Park, Kyung-Jo (Department of Mechanical and Automotive Engineering, Chonnam University)
  • 박경조 (전남대학교 기계자동차공학부)
  • Received : 2012.05.22
  • Accepted : 2012.11.06
  • Published : 2013.02.28
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Abstract

A study of the possible axisymmetric modes that propagate at low frequencies in buried, water-filled pipes is presented. It is well known that for a vacuum-pipe-vacuum system the sole non-torsional axisymmetric mode that exists at low frequencies is the fundamental L(0,1) mode. When a pipe is filled with water and still surrounded by a vacuum it is also known that another mode then appears which at low frequencies is characterized by predominantly axial water-borne displacements. In addition to these modes. this paper explores two other, less well known axisymmetric modes whose exitence depends on the acoustic properties of the outer medium that surrounds a pipe. The predicted characteristics of these modes are presented and the likelihood of them propagating over any significant distance in a buried water pipe is discussed.

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