Lamb wave characterization by differential reassignment and non-linear anisotropic diffusion

✍ Scribed by Oliver Kotte; Marc Niethammer; Laurence J. Jacobs

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 952 KB
• Volume: 39
• Category: Article
• ISSN: 0963-8695
• DOI: 10.1016/j.ndteint.2005.08.001

✦ Synopsis

This research develops an algorithm which provides excellent localization of Lamb wave dispersion curves while eliminating spurious components. This result is achieved by combining a differential reassignment procedure with non-linear anisotropic diffusion. This study examines the reassignment and diffusion components individually, before developing a combined algorithm. This combined algorithm is then applied to experimentally measured Lamb waves to develop an image of the dispersion curves of a plate with excellent clarity and definition. These dispersion curves are then used to increase the accuracy of a previously developed procedure to locate a notch.