Phased-array focusing with longitudinal guided waves in a viscoelastic coated hollow cylinder

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Phased-array focusing with longitudinal guided waves in a viscoelastic coated hollow cylinder

Phased-array focusing with longitudinal guided waves in a viscoelastic coated hollow cylinder

Luo, W. / Rose, J.L. / Velsor, J.K. van / Mu, J.

Guided wave phased-array focusing techniques have been studied and applied in the longrange guided wave inspection of industrial pipelines. Advantages include longer inspection distance, greater wave penetration power and higher detection sensitivity. For reasons of protection, safety and thermal efficiency, a large percentage of pipes are coated and/or encased and buried underground. A phased-array focusing study for guided waves is now considered on pipelines with viscoelastic coatings. In this paper, longitudinal guided wave focusing as well as axisymmetric wave propagation is studied in a bare pipe and a pipe with a viscoelastic coating. A finite element model is studied. First, an investigation on whether the coating has an affect on the axisymmetric guided wave propagation is reported. Based on the result of a single channel, phased array focusing with 8-channel segments is studied. This study provides a very useful tool and guidance for the analysis and examination of guided wave focusing in a real field pipeline under various coating and environmental conditions.

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Title :

Phased-array focusing with longitudinal guided waves in a viscoelastic coated hollow cylinder

Additional title:

Gruppenstrahler-Fokussierung von longitudinal geführten Wellen in einem Hohlzylinder der viskoelastisch beschichtet ist

Contributors:

Luo, W. (author) / Rose, J.L. (author) / Velsor, J.K. van (author) / Mu, J. (author)

Published in:

Review of Progress in Quantitative Nondestructive Evaluation, 32 ; 869-876

AIP Conference Proceedings ; 820

Publication date :

2006

Size :

8 Seiten, 7 Bilder, 4 Tabellen, 4 Quellen

ISBN :

ISSN :

DOI :

https://doi.org/10.1063/1.2184617

Type of media :

Conference paper

Type of material :

Storage medium

Language :

English

Keywords :

zerstörungsfreie Prüfung , Ultraschallprüfung , Ultraschallprüfkopf , Gruppenstrahler , fokussierender Prüfkopf , geführte Schallwelle , Viskoelastizität , beschichteter Werkstoff , Hohlkörper , Zylinder , Rohrfernleitung

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