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Video visualization of the dispersive behaviour of Rayleigh and Lamb wavetrains by double-pulsed TV holography

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dc.contributor.author Deán Ben, José Luis
dc.contributor.author Trillo Yáñez, María Cristina
dc.contributor.author Fernández Doval, Ángel Manuel
dc.contributor.author Fernández Fernández, José Luis
dc.date.accessioned 2016-06-02T07:02:32Z
dc.date.available 2016-06-02T07:02:32Z
dc.date.issued 2008-06-04
dc.identifier.uri http://hdl.handle.net/11093/235
dc.description.abstract In this work we present an application of TV holography to the generation of movies showing the propagation of acoustic guided waves in aluminium plates. Each movie shows a wavetrain whose envelope (i.e., the acoustic amplitude) and carrier wave move at the group and phase velocities, respectively. In particular, we use the S0 Lamb mode and the Rayleigh wave to illustrate the behaviour of dispersive and non-dispersive waves. Both wavetrains were generated by means of the classical wedge method and detected with our double-pulsed TV holography system, which renders 2D maps of the instantaneous out-of-plane displacement fields of the plate surface. The snapshots of the movie are obtained from a set of these 2D measurements, taken under repeatability conditions by successively increasing the delay between generation and detection. Then, a processing based on the 3D-FFT is applied to the set; the result is a new set of complex maps that permits to characterize the evolution of the positions of the envelope centre and of a point with a given value of the phase, so that it is possible to compare the phase and group velocities of the wavetrain. spa
dc.description.sponsorship Ministerio de Educación y Ciencia y Comisión Europea (FEDER) | Ref. DPI2005-09203-C03-01 spa
dc.description.sponsorship Dirección Xeral de Investigación, Desenvolvemento e Innovación, Xunta de Galicia | Ref. PGIDIT06PXIC303193PN spa
dc.description.sponsorship Universidad de Vigo | Ref. I608122F64102 spa
dc.language.iso eng spa
dc.title Video visualization of the dispersive behaviour of Rayleigh and Lamb wavetrains by double-pulsed TV holography spa
dc.type conferenceObject spa
dc.rights.accessRights openAccess spa
dc.identifier.doi 10.1117/12.803003
dc.identifier.editor http://proceedings.spiedigitallibrary.org/proceeding.aspx?doi=10.1117/12.803003 spa
dc.publisher.departamento Física aplicada spa
dc.conferenceObject.type Comunicación extensa internacional spa
dc.identifier.conferenceObject Eighth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, Ancona, Italia, 17-20 junio 2008 spa
dc.identifier.conference http://www.aivela.org spa
dc.publisher.grupoinvestigacion Grupo de Metroloxía Óptica spa
dc.subject.unesco 3311.11 Instrumentos Opticos spa
dc.subject.unesco 2209.07 Holografía spa
dc.subject.unesco 2201.09 Ultrasonidos spa
dc.date.updated 2016-05-31T21:48:40Z


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