J. Phys. IV France 02 (1992) C1-1095-C1-1098
ÉVOLUTION DES FRÉQUENCESD DES RÉSONANCES DE SCHOLTE-STONELEY EN INCIDENCE OBLIQUEP. REMBERT1, O. LENOIR1, J.L. IZBICKI1, J.L. ROUSSELOT1, 2, A. CAND1, 3 and J. RIPOCHE1
1 Laboratoire d'Acoustique Ultrasonore et d'Électronique, URA CNRS 1373, Université du Havre, Place Robert Schuman, F-76610 Le Havre, France
2 Le Centre Thomson d'Applications Radars (L.C. TA.R.), 6 rue Nieuport, Vélizy-Villacoublay cedex, France
3 Groupe de Physique des Solides, U.R.A. C.N.R.S. 17, Univers26 de Park VII, 2 place Jussieu, Tour 23, F-75251 Paris cedex 05, France
The authors deal with the study of the acoustic scattering at oblique incidence, by infinite cylindrical elastic shells immersed in water. In particular, the study is focalized upon the detection of the Scholte-Stoneley waves reemission, by means of the isolation of the associated resonances, and the evolution of their frequencies versus the angle of incidence. The experiment are performed, involving the quasi-harmonic M.I.R. (Method of Isolation of Resonances). For each value of the angle of incidence (varying from O* to 4 0 ' ) ' the Scholte-Stoneley resonance frequencies are pointed out on the so obtained resonance spectra. The follow-up of the frequencies versus the incidence angle is performed and compared with the theoretical one. A good agreement is observed between them.
© EDP Sciences 1992