Application of orthogonality-relation for the separation of Lamb modes at a plate edge: numerical and experimental predictions.
Identifieur interne : 000196 ( Main/Exploration ); précédent : 000195; suivant : 000197Application of orthogonality-relation for the separation of Lamb modes at a plate edge: numerical and experimental predictions.
Auteurs : M. Ratassepp [Estonie] ; A. Klauson [Estonie] ; F. Chati [France] ; F. Léon [France] ; D. Décultot [France] ; G. Maze [France] ; M. Fritzsche [Allemagne]Source :
- Ultrasonics [ 1874-9968 ] ; 2015.
Abstract
In this study the orthogonality relation-based method for post-processing finite element (FE) predictions and experimental measurements is applied in order to separate Lamb modes at a plate edge at normal incidence. The scattered wave field from the free edge is assumed to be a superposition of all the eigenmodes of an infinite plate. The eigenmode amplitudes of the reflected wave field are determined by implementing the orthogonality-based method on the measured plate edge displacements. Overlapping wavepackets of Lamb modes at a plate edge are simulated by using the FE model and the experiment in the case of an incident S0 mode in a plate with a notch. In the experiment a 3D Scanning Laser Doppler Vibrometer (3D SLDV) (Johansmann and Sauer, 2005) is used to measure 3 dimensional vibrations and thus the edge two-dimensional displacement components simultaneously. It is demonstrated that it is possible to extract signals of various propagating and non-propagating modes in time-domain. The influences of the errors in practical measurements on the extraction procedure have also been studied.
DOI: 10.1016/j.ultras.2014.10.022
PubMed: 25465106
Affiliations:
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Ratassepp</name><affiliation wicri:level="1"><nlm:affiliation>Department of Mechanics, Tallinn University of Technology, Ehitajate tee 5, Tallinn 19086, Estonia. Electronic address: madis.ratassepp@ttu.ee.</nlm:affiliation><country xml:lang="fr">Estonie</country><wicri:regionArea>Department of Mechanics, Tallinn University of Technology, Ehitajate tee 5, Tallinn 19086</wicri:regionArea><wicri:noRegion>Tallinn 19086</wicri:noRegion></affiliation></author><author><name sortKey="Klauson, A" sort="Klauson, A" uniqKey="Klauson A" first="A" last="Klauson">A. Klauson</name><affiliation wicri:level="1"><nlm:affiliation>Department of Mechanics, Tallinn University of Technology, Ehitajate tee 5, Tallinn 19086, Estonia.</nlm:affiliation><country xml:lang="fr">Estonie</country><wicri:regionArea>Department of Mechanics, Tallinn University of Technology, Ehitajate tee 5, Tallinn 19086</wicri:regionArea><wicri:noRegion>Tallinn 19086</wicri:noRegion></affiliation></author><author><name sortKey="Chati, F" sort="Chati, F" uniqKey="Chati F" first="F" last="Chati">F. Chati</name><affiliation wicri:level="3"><nlm:affiliation>Laboratoire Ondes et Milieux Complexes UMR CNRS 6294, Université Le Havre, 75 rue Bellot CS 50540, Le Havre, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Laboratoire Ondes et Milieux Complexes UMR CNRS 6294, Université Le Havre, 75 rue Bellot CS 50540, Le Havre</wicri:regionArea><placeName><region type="region" nuts="2">Région Normandie</region><region type="old region" nuts="2">Basse-Normandie</region><settlement type="city">Le Havre</settlement></placeName></affiliation></author><author><name sortKey="Leon, F" sort="Leon, F" uniqKey="Leon F" first="F" last="Léon">F. Léon</name><affiliation wicri:level="3"><nlm:affiliation>Laboratoire Ondes et Milieux Complexes UMR CNRS 6294, Université Le Havre, 75 rue Bellot CS 50540, Le Havre, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Laboratoire Ondes et Milieux Complexes UMR CNRS 6294, Université Le Havre, 75 rue Bellot CS 50540, Le Havre</wicri:regionArea><placeName><region type="region" nuts="2">Région Normandie</region><region type="old region" nuts="2">Basse-Normandie</region><settlement type="city">Le Havre</settlement></placeName></affiliation></author><author><name sortKey="Decultot, D" sort="Decultot, D" uniqKey="Decultot D" first="D" last="Décultot">D. Décultot</name><affiliation wicri:level="3"><nlm:affiliation>Laboratoire Ondes et Milieux Complexes UMR CNRS 6294, Université Le Havre, 75 rue Bellot CS 50540, Le Havre, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Laboratoire Ondes et Milieux Complexes UMR CNRS 6294, Université Le Havre, 75 rue Bellot CS 50540, Le Havre</wicri:regionArea><placeName><region type="region" nuts="2">Région Normandie</region><region type="old region" nuts="2">Basse-Normandie</region><settlement type="city">Le Havre</settlement></placeName></affiliation></author><author><name sortKey="Maze, G" sort="Maze, G" uniqKey="Maze G" first="G" last="Maze">G. Maze</name><affiliation wicri:level="3"><nlm:affiliation>Laboratoire Ondes et Milieux Complexes UMR CNRS 6294, Université Le Havre, 75 rue Bellot CS 50540, Le Havre, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Laboratoire Ondes et Milieux Complexes UMR CNRS 6294, Université Le Havre, 75 rue Bellot CS 50540, Le Havre</wicri:regionArea><placeName><region type="region" nuts="2">Région Normandie</region><region type="old region" nuts="2">Basse-Normandie</region><settlement type="city">Le Havre</settlement></placeName></affiliation></author><author><name sortKey="Fritzsche, M" sort="Fritzsche, M" uniqKey="Fritzsche M" first="M" last="Fritzsche">M. Fritzsche</name><affiliation wicri:level="1"><nlm:affiliation>Polytec GmbH, Sales International, Waldbronn, Germany.</nlm:affiliation><country xml:lang="fr">Allemagne</country><wicri:regionArea>Polytec GmbH, Sales International, Waldbronn</wicri:regionArea><wicri:noRegion>Waldbronn</wicri:noRegion><wicri:noRegion>Waldbronn</wicri:noRegion><wicri:noRegion>Waldbronn</wicri:noRegion></affiliation></author></analytic><series><title level="j">Ultrasonics</title><idno type="eISSN">1874-9968</idno><imprint><date when="2015" type="published">2015</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">In this study the orthogonality relation-based method for post-processing finite element (FE) predictions and experimental measurements is applied in order to separate Lamb modes at a plate edge at normal incidence. The scattered wave field from the free edge is assumed to be a superposition of all the eigenmodes of an infinite plate. The eigenmode amplitudes of the reflected wave field are determined by implementing the orthogonality-based method on the measured plate edge displacements. Overlapping wavepackets of Lamb modes at a plate edge are simulated by using the FE model and the experiment in the case of an incident S0 mode in a plate with a notch. In the experiment a 3D Scanning Laser Doppler Vibrometer (3D SLDV) (Johansmann and Sauer, 2005) is used to measure 3 dimensional vibrations and thus the edge two-dimensional displacement components simultaneously. It is demonstrated that it is possible to extract signals of various propagating and non-propagating modes in time-domain. The influences of the errors in practical measurements on the extraction procedure have also been studied.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Estonie</li><li>France</li></country><region><li>Basse-Normandie</li><li>Région Normandie</li></region><settlement><li>Le Havre</li></settlement></list><tree><country name="Estonie"><noRegion><name sortKey="Ratassepp, M" sort="Ratassepp, M" uniqKey="Ratassepp M" first="M" last="Ratassepp">M. Ratassepp</name></noRegion><name sortKey="Klauson, A" sort="Klauson, A" uniqKey="Klauson A" first="A" last="Klauson">A. Klauson</name></country><country name="France"><region name="Région Normandie"><name sortKey="Chati, F" sort="Chati, F" uniqKey="Chati F" first="F" last="Chati">F. Chati</name></region><name sortKey="Decultot, D" sort="Decultot, D" uniqKey="Decultot D" first="D" last="Décultot">D. Décultot</name><name sortKey="Leon, F" sort="Leon, F" uniqKey="Leon F" first="F" last="Léon">F. Léon</name><name sortKey="Maze, G" sort="Maze, G" uniqKey="Maze G" first="G" last="Maze">G. Maze</name></country><country name="Allemagne"><noRegion><name sortKey="Fritzsche, M" sort="Fritzsche, M" uniqKey="Fritzsche M" first="M" last="Fritzsche">M. Fritzsche</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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