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Axisymmetric fluid-dominated wave in fluid-filled plastic pipes: Loading effects of surrounding elastic medium

Axisymmetric fluid-dominated wave in fluid-filled plastic pipes: Loading effects of surrounding elastic medium
Axisymmetric fluid-dominated wave in fluid-filled plastic pipes: Loading effects of surrounding elastic medium
Axisymmetric (n = 0) waves that propagate at low frequencies are of practical interest in the application of acoustic techniques for the detection of leaks in fluid-filled pipelines. A general expression for the fluid-dominated (s = 1) wavenumber is presented in a thin-walled fluid-filled pipe surrounded by an elastic medium. In this paper the analysis is extended to investigate the loading effects of surrounding medium on the low-frequency propagation characteristics of the s = 1 wave. The analytical model is subsequently applied to MDPE water pipes surrounding by three media, namely an air, water and soil. It is used to demonstrate explicitly the loading effects of surrounding medium, acting as a combination of mass, stiffness and radiation damping on the s = 1 wavenumber. Good agreement is achieved between the measurements and predictions. The theory with experimental validations provides the basis for improving acoustic leak detection methods in fluid-filled pipe systems.
Fluid-filled pipe; , acoustics, wavenumber, elastic medium
0003-682X
43-49
Gao, Yan
e46455ac-b265-4982-b2f5-4024d386504e
Liu, Yuyou
e9406ef3-07f1-4b84-a9a0-0ef33da3edbc
Muggleton, Jennifer
2298700d-8ec7-4241-828a-1a1c5c36ecb5
Gao, Yan
e46455ac-b265-4982-b2f5-4024d386504e
Liu, Yuyou
e9406ef3-07f1-4b84-a9a0-0ef33da3edbc
Muggleton, Jennifer
2298700d-8ec7-4241-828a-1a1c5c36ecb5

Gao, Yan, Liu, Yuyou and Muggleton, Jennifer (2017) Axisymmetric fluid-dominated wave in fluid-filled plastic pipes: Loading effects of surrounding elastic medium. Applied Acoustics, 116, 43-49. (doi:10.1016/j.apacoust.2016.09.016).

Record type: Article

Abstract

Axisymmetric (n = 0) waves that propagate at low frequencies are of practical interest in the application of acoustic techniques for the detection of leaks in fluid-filled pipelines. A general expression for the fluid-dominated (s = 1) wavenumber is presented in a thin-walled fluid-filled pipe surrounded by an elastic medium. In this paper the analysis is extended to investigate the loading effects of surrounding medium on the low-frequency propagation characteristics of the s = 1 wave. The analytical model is subsequently applied to MDPE water pipes surrounding by three media, namely an air, water and soil. It is used to demonstrate explicitly the loading effects of surrounding medium, acting as a combination of mass, stiffness and radiation damping on the s = 1 wavenumber. Good agreement is achieved between the measurements and predictions. The theory with experimental validations provides the basis for improving acoustic leak detection methods in fluid-filled pipe systems.

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More information

Accepted/In Press date: 12 September 2016
e-pub ahead of print date: 16 September 2016
Published date: 15 January 2017
Keywords: Fluid-filled pipe; , acoustics, wavenumber, elastic medium
Organisations: Dynamics Group

Identifiers

Local EPrints ID: 406939
URI: http://eprints.soton.ac.uk/id/eprint/406939
ISSN: 0003-682X
PURE UUID: 9dc8c34e-eb87-4933-8daa-523299817861

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Date deposited: 28 Mar 2017 01:07
Last modified: 15 Mar 2024 12:51

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Contributors

Author: Yan Gao
Author: Yuyou Liu

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