Kubrusy, Alan C., Kang, Lei, von der Weid, Jean Pierre and Dixon, Steve (2022) Numerical investigation of application of unidirectional generation to improve signal interpretation of circumferential guided waves in pipes for defect detection. In: EWSHM 2022: European Workshop on Structural Health Monitoring, Palermo, Italy, 04-07 Jul 2022. Published in: Proceedings of the European Workshop on Structural Health Monitoring, 270 pp. 61-70. ISBN 9783031073212. doi:10.1007/978-3-031-07322-9_7 ISSN 2366-2557.

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Abstract

Monitoring and inspection of pipes are paramount in several industry sectors. A convenient approach employs shear horizontal ultrasonic guided waves that propagate circumferentially around the pipe, known as CSH waves. Typically, a pair of transducers, a transmitter and a receiver, can be used to interrogate the whole circumference. Conventional shear horizontal transducers generate waves that propagate in both directions, namely, clockwise and counterclockwise. Bidirectional generation complicates the interpretation of the received signal since the scattered waves from a potential defect can mix themselves or with one of the two direct waves generated by the transmitter. In this paper, we address how unidirectional generation can ease the signal interpretation task for circumferential guided wave testing utilizing finite element simulations. Unidirectional generation is based on dual periodic elements transducer driven by phased pulses, following a design previously presented. Generation and reception were performed with separate transducers on the outer surface of a 324 mm outer diameter, 6.25 mm wall thickness steel pipe. Corrosion-like defects were modelled on the inner surface. We show that, when the angular position of the defect approaches 180° from the transmitter, the defect echo can be almost completely masked by the wave generated in the opposite direction. Unidirectional generation of CSH waves proves itself to be an important feature in pipeline integrity monitoring, providing more reliable signal interpretation.

Item Type:	Conference Item (Paper)
Subjects:	Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH):	Ultrasonic testing, Ultrasonic waves, Pipelines -- Defects -- Analysis, Pipe -- Defects -- Analysis
Series Name:	Lecture Notes in Civil Engineering
Journal or Publication Title:	Proceedings of the European Workshop on Structural Health Monitoring
Publisher:	Springer
ISBN:	9783031073212
ISSN:	2366-2557
Book Title:	European Workshop on Structural Health Monitoring
Official Date:	22 June 2022
Dates:	Date Event 22 June 2022 Published
Volume:	270
Page Range:	pp. 61-70
DOI:	10.1007/978-3-031-07322-9_7
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Copyright Holders:	© 2023 The Author(s), under exclusive license to Springer Nature Switzerland AG
Date of first compliant deposit:	4 January 2023
RIOXX Funder/Project Grant:	Project/Grant ID RIOXX Funder Name Funder ID 001 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior http://dx.doi.org/10.13039/501100002322 UNSPECIFIED Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro http://dx.doi.org/10.13039/501100004586 UNSPECIFIED Conselho Nacional de Desenvolvimento Científico e Tecnológico http://dx.doi.org/10.13039/501100003593
Conference Paper Type:	Paper
Title of Event:	EWSHM 2022: European Workshop on Structural Health Monitoring
Type of Event:	Workshop
Location of Event:	Palermo, Italy
Date(s) of Event:	04-07 Jul 2022
Related URLs:	Organisation

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