A phase velocity filter for the measurement of lamb wave dispersion
Conference paper
Adams, C., Harput, S., Cowell, D. and Freear, S. (2017). A phase velocity filter for the measurement of lamb wave dispersion. 2016 IEEE International Ultrasonics Symposium (IUS). Tours, France 18 - 21 Sep 2016 Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/ULTSYM.2016.7728797
Authors | Adams, C., Harput, S., Cowell, D. and Freear, S. |
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Type | Conference paper |
Abstract | The complex, multi-modal and dispersive nature of guided waves makes them extremely effective in the non destructive evaluation of plate-like structures. Knowledge of the dispersion relation of a material is a prerequisite to many guided wave experiments. A frequency-phase velocity map is by far the most useful representation of dispersion. These phase velocity curves can be obtained numerically by solving the Lamb equations, however instabilities and unfamiliarity with the specimen's parameters makes experimentally obtained dispersion relation desirable. Transformations can be applied to an experimentally obtained frequency-wave number map but it requires prohibitively high number of sampling points in space to resolve modes across the full bandwidth of the transducer. The phase velocity filter described here is able to extract wavelets of a particular phase velocity irrespective of frequency. When applied to the acquisition of dispersion relation, the technique exhibits reduced artefacts and is able to extract modes across the full bandwidth of the excitation. Results show a bandwidth increase of approximately 58%. © 2016, IEEE. This is an author produced version of a paper published in IEEE International Ultrasonics Symposium, IUS. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works. Uploaded in accordance with the publisher’s self-archiving policy. |
Year | 2017 |
Publisher | Institute of Electrical and Electronics Engineers (IEEE) |
Digital Object Identifier (DOI) | https://doi.org/10.1109/ULTSYM.2016.7728797 |
Web address (URL) | https://ieeexplore.ieee.org/document/7728797 |
Accepted author manuscript | License File Access Level Open |
Publication dates | |
Online | 03 Nov 2016 |
Publication process dates | |
Accepted | 21 Sep 2016 |
Deposited | 12 Aug 2019 |
ISBN | 9781467398978 |
Web address (URL) of conference proceedings | https://ieeexplore.ieee.org/xpl/conhome/7589760/proceeding |
https://openresearch.lsbu.ac.uk/item/87x7v
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Accepted author manuscript
A Phase Velocity Filter for the Measurement of Lamb Wave Dispersion.pdf | ||
License: CC BY 4.0 | ||
File access level: Open |
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