TY - JOUR
T1 - Matched-field processing for leak localization in a viscoelastic pipe
T2 - An experimental study
AU - Wang, Xun
AU - Lin, Jingrong
AU - Keramat, Alireza
AU - Ghidaoui, Mohamed S.
AU - Meniconi, Silvia
AU - Brunone, Bruno
N1 - Funding Information:
This work has been supported by research grants from the Research Grant Council of Hong Kong SAR (Project No.: T21-602/15R), Chinese Estates Professorship in Engineering (No.: R8031), and Italian MIUR and University of Perugia within the program Dipartimenti di Eccellenza 2018–2022. The authors would like to thank Duncan A. McInnis, Asgar Ahadpour Dodaran, Man Yue Lam, Moez Louati, Muhammad Waqar, and Kamrun Nahar Keya for their helps on the experiments at Hong Kong University of Science and Technology.
Publisher Copyright:
© 2019 Elsevier Ltd
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2019/6/1
Y1 - 2019/6/1
N2 - This paper applies the matched-field processing (MFP) method to leakage localization in a viscoelastic pipe. The viscoelasticity of pipe wall is included in the governing equations of transient wave via the generalized Kelvin-Voigt model and its effect is finally translated into a frequency-dependent wave speed. Then, a leak is localized by MFP via a 1D search of leak location along the pipe, independent of the leak size. Transient experiments with viscoelastic pipe in the Water Engineering Laboratory at University of Perugia and in the Water Resources Research Laboratory at Hong Kong University of Science and Technology are studied. Experimental results demonstrate that the inclusion of pipe wall viscoelasticity and using more frequencies (instead of using only resonant frequencies) improve significantly the leak localization accuracy. It is shown that the MFP leak localization is accurate even for a small leak (the flow ratio of leak and main pipe is approximately 10%) in a noisy environment: among 50 transient experiments, the maximum error of MFP leak localization is only 1.14 m and in the other 49 experiments the error is always lower than 1 m.
AB - This paper applies the matched-field processing (MFP) method to leakage localization in a viscoelastic pipe. The viscoelasticity of pipe wall is included in the governing equations of transient wave via the generalized Kelvin-Voigt model and its effect is finally translated into a frequency-dependent wave speed. Then, a leak is localized by MFP via a 1D search of leak location along the pipe, independent of the leak size. Transient experiments with viscoelastic pipe in the Water Engineering Laboratory at University of Perugia and in the Water Resources Research Laboratory at Hong Kong University of Science and Technology are studied. Experimental results demonstrate that the inclusion of pipe wall viscoelasticity and using more frequencies (instead of using only resonant frequencies) improve significantly the leak localization accuracy. It is shown that the MFP leak localization is accurate even for a small leak (the flow ratio of leak and main pipe is approximately 10%) in a noisy environment: among 50 transient experiments, the maximum error of MFP leak localization is only 1.14 m and in the other 49 experiments the error is always lower than 1 m.
KW - Complex environment
KW - Leakage localization
KW - Matched-field processing
KW - Pipe viscoelasticity
KW - Transient wave
UR - http://www.scopus.com/inward/record.url?scp=85061231066&partnerID=8YFLogxK
U2 - 10.1016/j.ymssp.2019.02.004
DO - 10.1016/j.ymssp.2019.02.004
M3 - Journal article
AN - SCOPUS:85061231066
SN - 0888-3270
VL - 124
SP - 459
EP - 478
JO - Mechanical Systems and Signal Processing
JF - Mechanical Systems and Signal Processing
ER -