Title :
P3K-1 Coupled Modes on a Rectangular Grating
Author :
Morvan, Bruno ; Leduc, Damien ; Izbicki, Jean-Louis ; Hladky-Hennion, Anne-Christine
Author_Institution :
Lab. d´´Acoustique Ultrasonore et d´´Electronique, Havre Univ., Le Havre
Abstract :
This work deals with the propagation of ultrasonic Lamb waves in a solid plate with a periodical corrugated interface. The periodicity of the guide implies that the Lamb waves dispersion curves fold back at the edge of the Brillouin zone. For the mini-stop-band, dispersion curves cross and a coupling is possible between the modes. These phenomena are experimentally and numerically highlighted for a metallic waveguide. Finally conversions or existence of gaps are linked with the power spectral density of the grating profile
Keywords :
plates (structures); surface acoustic waves; ultrasonic dispersion; ultrasonic propagation; Brillouin zone; Lamb waves dispersion curve; grating profile; metallic waveguide; periodical corrugated interface; power spectral density; rectangular grating; solid plate; stop band; ultrasonic Lamb wave propagation; Aluminum; Corrugated surfaces; Frequency conversion; Gratings; Photonic band gap; Resins; Rough surfaces; Solids; Surface roughness; Surface waves;
Conference_Titel :
Ultrasonics Symposium, 2006. IEEE
Conference_Location :
Vancouver, BC
Print_ISBN :
1-4244-0201-8
Electronic_ISBN :
1051-0117
DOI :
10.1109/ULTSYM.2006.562
