Imperial College London
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ProfessorMichaelLowe

Faculty of Engineering, Department of Mechanical Engineering

Head of Department of Mechanical Engineering
 
 
 
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Contact

 

+44 (0)20 7594 7000m.lowe Website

 
 
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Assistant

 

Ms Nina Hancock +44 (0)20 7594 7068

 
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Location

 

577DCity and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Leinov:2015:10.1016/j.jsv.2015.02.036,
author = {Leinov, E and Lowe, MJS and Cawley, P},
doi = {10.1016/j.jsv.2015.02.036},
journal = {Journal of Sound and Vibration},
pages = {96--114},
title = {Investigation of guided wave propagation and attenuation in pipe buried in sand},
url = {http://dx.doi.org/10.1016/j.jsv.2015.02.036},
volume = {347},
year = {2015}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Long-range guided wave testing is a well-established method for detection of corrosion defects in pipelines. The method is currently used routinely for above ground pipelines in a variety of industries, e.g. petrochemical and energy. When the method is applied to pipes buried in soil, test ranges tend to be significantly compromised and unpredictable due to attenuation of the guided wave resulting from energy leakage into the embedding soil. The attenuation characteristics of guided wave propagation in an 8 in. pipe buried in sand are investigated using a laboratory full-scale experimental rig and model predictions. We report measurements of attenuation of the T(0,1) and L(0,2) guided wave modes over a range of sand conditions, including loose, compacted, mechanically compacted, water saturated and drained. Attenuation values are found to be in the range of 1.65–5.5 dB/m and 0.98–3.2 dB/m for the torsional and longitudinal modes, respectively, over the frequency of 11–34 kHz. The application of overburden pressure modifies the compaction of the sand and increases the attenuation. Mechanical compaction of the sand yields similar attenuation values to those obtained with applied overburden pressure. The attenuation decreases in the fully water-saturated sand, and increases in drained sand to values comparable with those obtained for compacted sand. Attenuation measurements are compared with Disperse software model predictions and confirm that the attenuation phenomenon in buried pipes is essentially governed by the bulk shear velocity in the sand. The attenuation behaviour of the torsional guided wave mode is found not to be captured by a uniform soil model; comparison with predictions obtained with the Disperse software suggest that this is likely to be due to a layer of sand adhering to the surface of the pipe.
AU  - Leinov,E
AU  - Lowe,MJS
AU  - Cawley,P
DO  - 10.1016/j.jsv.2015.02.036
EP  - 114
PY  - 2015///
SN  - 0022-460X
SP  - 96
TI  - Investigation of guided wave propagation and attenuation in pipe buried in sand
T2  - Journal of Sound and Vibration
UR  - http://dx.doi.org/10.1016/j.jsv.2015.02.036
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000353197100007&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://www.sciencedirect.com/science/article/pii/S0022460X1500190X
UR  - http://hdl.handle.net/10044/1/21297
VL  - 347
ER  -
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