Pipe Attrition Acoustic Locater (PAAL) from multi-mode dispersion analysis

Bouko Vogelaar; Michael Golombok; Xander Campman

doi:10.1016/j.ultras.2016.02.009

Pipe Attrition Acoustic Locater (PAAL) from multi-mode dispersion analysis

Ultrasonics. 2016 May:68:80-8. doi: 10.1016/j.ultras.2016.02.009. Epub 2016 Feb 18.

Authors

Bouko Vogelaar¹, Michael Golombok², Xander Campman²

Affiliations

¹ Department of Mechanical Engineering, Eindhoven University of Technology, Groene Loper 15, 5600MB Eindhoven, The Netherlands. Electronic address: b.b.s.a.vogelaar@tue.nl.
² Shell Global Solutions International B.V., Kessler Park 1, 2288 GS Rijswijk, The Netherlands.

PMID: 26922401
DOI: 10.1016/j.ultras.2016.02.009

Abstract

Multi-mode dispersion imaging shows that pure dispersion-free torsional waves are reflected at a pipe end and flexural wave modes are suppressed. This effect can be used to locate and assess internal damage. The end reflection coefficient of this single propagating mode decreases with increasing wear. The pipe damage is located from the travel time of the torsional wave component reflected from the damage point.

Keywords: Corrosion monitoring; Guided waves: NDE; Pipe inspection.