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Effect of shear coupling on the axisymmetric wave motion for buried fluid-filled pipes

Effect of shear coupling on the axisymmetric wave motion for buried fluid-filled pipes
Effect of shear coupling on the axisymmetric wave motion for buried fluid-filled pipes
This paper is concerned with the effects of shear coupling at the pipe/soil interface on the ax-isymmetric wave motions for buried fluid-filled pipes. Two extreme cases are of particular interest: the "slip" condition representing lubricated contact; and the "no slip" condition representing compact contact. Dispersion relations for the w=0 axisymmetric waves are given by accounting for the fully three-dimensional effects of the surrounding soil, from which low-frequency analytical solutions to the fluid-borne s=\ wavenumber can be determined. Theoretical predictions are presented for a test MDPE water pipe buried in sandy soil for the s=\ wavenumber measurements. It is shown that the predominant effect of shear coupling at the pipe/soil interface is to add stiffness in contrast with mass loading when the shear coupling is neglected, and damping due to radiation. Comparing the two coupling cases, it is found that the real part of the wavenumber for compact contact is slightly lower than that for lubricated contact, as expected, due to the additional lateral constraint on the pipe wall. Nevertheless, the stiffness effect on the wavespeed is relatively small for both coupling cases compared with the compliance effect of the shell wall. For this particular type of soil, the attenuation for the compact coupling case is greater than for the lubricated contact case. Experimental measurements show good agreement with the predictions, and indicate that: as anticipated, for the measurement pipe, the coupling between the pipe and the soil falls between the two extremes considered.
Gao, Yan
23154085-596b-483e-8c31-79916fca87ea
Muggleton, Jennifer
2298700d-8ec7-4241-828a-1a1c5c36ecb5
Gao, Yan
23154085-596b-483e-8c31-79916fca87ea
Muggleton, Jennifer
2298700d-8ec7-4241-828a-1a1c5c36ecb5

Gao, Yan and Muggleton, Jennifer (2014) Effect of shear coupling on the axisymmetric wave motion for buried fluid-filled pipes. 21st International Congress on Sound and Vibration, Beijing, Beijing, China. 13 - 17 Jul 2014.

Record type: Conference or Workshop Item (Paper)

Abstract

This paper is concerned with the effects of shear coupling at the pipe/soil interface on the ax-isymmetric wave motions for buried fluid-filled pipes. Two extreme cases are of particular interest: the "slip" condition representing lubricated contact; and the "no slip" condition representing compact contact. Dispersion relations for the w=0 axisymmetric waves are given by accounting for the fully three-dimensional effects of the surrounding soil, from which low-frequency analytical solutions to the fluid-borne s=\ wavenumber can be determined. Theoretical predictions are presented for a test MDPE water pipe buried in sandy soil for the s=\ wavenumber measurements. It is shown that the predominant effect of shear coupling at the pipe/soil interface is to add stiffness in contrast with mass loading when the shear coupling is neglected, and damping due to radiation. Comparing the two coupling cases, it is found that the real part of the wavenumber for compact contact is slightly lower than that for lubricated contact, as expected, due to the additional lateral constraint on the pipe wall. Nevertheless, the stiffness effect on the wavespeed is relatively small for both coupling cases compared with the compliance effect of the shell wall. For this particular type of soil, the attenuation for the compact coupling case is greater than for the lubricated contact case. Experimental measurements show good agreement with the predictions, and indicate that: as anticipated, for the measurement pipe, the coupling between the pipe and the soil falls between the two extremes considered.

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More information

Published date: 2014
Venue - Dates: 21st International Congress on Sound and Vibration, Beijing, Beijing, China, 2014-07-13 - 2014-07-17

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Local EPrints ID: 452364
URI: http://eprints.soton.ac.uk/id/eprint/452364
PURE UUID: 9c8d99de-6aef-48e6-9689-5102ae61739d

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Date deposited: 08 Dec 2021 18:48
Last modified: 04 Mar 2024 18:14

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Contributors

Author: Yan Gao

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