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http://dx.doi.org/10.9726/kspse.2013.17.1.036

Analysis on the Likelihood of Axisymmetric Wave Propagation in Buried Water Pipes  

Park, Kyung-Jo (Department of Mechanical and Automotive Engineering, Chonnam University)
Publication Information
Journal of Power System Engineering / v.17, no.1, 2013 , pp. 36-41 More about this Journal
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.
Keywords
Axisymmetric Mode; Attenuation; Phase Velocity; Soil Bulk Velocity;
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Times Cited By KSCI : 2  (Citation Analysis)
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