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:2016:10.1121/1.4972118,
author = {Leinov, E and Lowe, MJS and Cawley, P},
doi = {10.1121/1.4972118},
journal = {The Journal of the Acoustical Society of America},
title = {Investigation of guided wave propagation in pipes fully- and partially-embedded in concrete},
url = {http://dx.doi.org/10.1121/1.4972118},
volume = {140},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The application of long-range guided-wave testing to pipes embedded in concrete results in unpredictable test-ranges. The influence of the circumferential extent of the embedding-concrete around a steel pipe on the guided wave propagation is investigated. An analytical model is used to study the axisymmetric fully embedded pipe case, while explicit finite-element and semi-analytical finite-element simulations are utilised to investigate a partially embedded pipe. Model predictions and simulations are compared with full-scale guided-wave tests. The transmission-loss of the T(0,1)-mode in an 8 in. steel pipe fully embedded over an axial length of 0.4 m is found to be in the range of 32–36 dB while it reduces by a factor of 5 when only 50% of the circumference is embedded. The transmission-loss in a fully embedded pipe is mainly due to attenuation in the embedded section while in a partially embedded pipe it depend strongly on the extent of mode-conversion at entry to the embedded-section; low loss modes with energy concentrated in the region of the circumference not-covered with concrete have been identified. The results show that in a fully embedded pipe, inspection beyond a short distance will not be possible, whereas when the concrete is debonded over a fraction of the pipe circumference, inspection of substantially longer lengths may be possible.
AU  - Leinov,E
AU  - Lowe,MJS
AU  - Cawley,P
DO  - 10.1121/1.4972118
PY  - 2016///
SN  - 1520-8524
TI  - Investigation of guided wave propagation in pipes fully- and partially-embedded in concrete
T2  - The Journal of the Acoustical Society of America
UR  - http://dx.doi.org/10.1121/1.4972118
UR  - http://hdl.handle.net/10044/1/42924
VL  - 140
ER  -
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