title: Pipe Attrition Acoustic Locater (PAAL) from multi-mode dispersion analysis.
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.
authors.affiliation: Department of Mechanical Engineering, Eindhoven University of Technology, Groene Loper 15, 5600MB Eindhoven, The Netherlands. Electronic address: b.b.s.a.vogelaar@tue.nl.
authors.forename: Bouko
authors.initials: B
authors.lastname: Vogelaar
authors.affiliation: Shell Global Solutions International B.V., Kessler Park 1, 2288 GS Rijswijk, The Netherlands.
authors.forename: Michael
authors.initials: M
authors.lastname: Golombok
authors.affiliation: Shell Global Solutions International B.V., Kessler Park 1, 2288 GS Rijswijk, The Netherlands.
authors.forename: Xander
authors.initials: X
authors.lastname: Campman
keywords: Corrosion monitoring; Guided waves: NDE; Pipe inspection