Issue
J. Phys. IV France
Volume 04, Number C5, Mai 1994
3ème Congrés français d'acoustique
3rd French conference on acoustics
Page(s) C5-913 - C5-916
DOI https://doi.org/10.1051/jp4:19945200
3ème Congrés français d'acoustique
3rd French conference on acoustics

J. Phys. IV France 04 (1994) C5-913-C5-916

DOI: 10.1051/jp4:19945200

Modes de Lamb de deux plaques élastiques couplées par une couche d'eau

O. LENOIR1, H. KHELIL1, J.-L. IZBICKI1, M. ROUSSEAU2, F. COULOUVRAT2 and Ph. GATIGNOL3

1  Laboratoire d'Acoustique Ultrasonore et d'Electronique, Université du Havre, URA 1373 du CNRS, Place R. Schuman, 76610 Le Havre, France
2  Laboratoire de Modélisation en Mécanique, Université Pierre et Marie Curie, URA 229 du CNRS, Case 162, 4 Place Jussieu, 75252 Paris cedex 05, France
3  LG2mS, Université de Technologie de Compiègne, URA 1505 du CNRS, BP. 206, 60206 Compiègne cedex, France


Abstract
A comparison theory / experiment describes the behaviour of acoustical free modes for a structure composed of two identical elastic layers coupled by a thin water film. The solutions of the dispersion equation written under a closed form, are obtained numerically. Simultaneously, the high and low frequence limits, and also the cut-off frequencies are evaluated asymptotically. The cut-off frequencies repartition has been confirmed by the experiment, on either the retrodiffusion or the resonance spectrum.



© EDP Sciences 1994