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Wavenumber prediction of waves in buried pipes for water leak detection

Wavenumber prediction of waves in buried pipes for water leak detection
Wavenumber prediction of waves in buried pipes for water leak detection
Water leaks are a topic of great concern in Britain and many other countries, because of decreasing water supplies and the deterioration of old pipework. Correlation techniques are widely used in leak detection, but for these to be effective, the propagation wavespeeds and wave attenuation must be known. Relatively predictable for metal pipes, these are largely unknown for the newer plastic pipes, being highly dependent on the pipe wall properties and the surrounding medium. In this paper, pipe equations for n=0 axisymmetric wave motion are derived for a fluid-filled pipe, surrounded by an infinite elastic medium which can support both longitudinal and shear waves. These equations are solved for two wave types,s =1,2, which correspond to a fluid dominated wave and an axial shell wave, and expressions for a complex wavenumber for each wave are given.
0022-460X
939-954
Muggleton, J.M.
2298700d-8ec7-4241-828a-1a1c5c36ecb5
Brennan, M.J.
87c7bca3-a9e5-46aa-9153-34c712355a13
Pinnington, R.J.
8c573d68-9de6-46df-95a4-23130f4fac9f
Muggleton, J.M.
2298700d-8ec7-4241-828a-1a1c5c36ecb5
Brennan, M.J.
87c7bca3-a9e5-46aa-9153-34c712355a13
Pinnington, R.J.
8c573d68-9de6-46df-95a4-23130f4fac9f

Muggleton, J.M., Brennan, M.J. and Pinnington, R.J. (2002) Wavenumber prediction of waves in buried pipes for water leak detection. Journal of Sound and Vibration, 249 (5), 939-954. (doi:10.1006/jsvi.2001.3881).

Record type: Article

Abstract

Water leaks are a topic of great concern in Britain and many other countries, because of decreasing water supplies and the deterioration of old pipework. Correlation techniques are widely used in leak detection, but for these to be effective, the propagation wavespeeds and wave attenuation must be known. Relatively predictable for metal pipes, these are largely unknown for the newer plastic pipes, being highly dependent on the pipe wall properties and the surrounding medium. In this paper, pipe equations for n=0 axisymmetric wave motion are derived for a fluid-filled pipe, surrounded by an infinite elastic medium which can support both longitudinal and shear waves. These equations are solved for two wave types,s =1,2, which correspond to a fluid dominated wave and an axial shell wave, and expressions for a complex wavenumber for each wave are given.

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Published date: 2002

Identifiers

Local EPrints ID: 10051
URI: http://eprints.soton.ac.uk/id/eprint/10051
ISSN: 0022-460X
PURE UUID: 5f5077e8-74f5-46d9-9d78-93e24b27e45c

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Date deposited: 18 Jan 2005
Last modified: 15 Jul 2019 19:37

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Contributors

Author: J.M. Muggleton
Author: M.J. Brennan
Author: R.J. Pinnington

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