Author(s)

N.F. Declercq, J Degrieck, R. Briers & 0.Leroy

Abstract

Some interesting features of the interaction of a bounded ultrasonic beam with a doubly corrugated interface between a solid and a liquid N. F. ~ e c l e r c ~ ' , J. ~ e ~ r i e c k ' , R. ~ r i e r s ~ & 0. ~ e r o ~ ~ '~oete Laboratory, Department of Mechanical Construction & Production, Ghent University, Belgium '~atho, Reno Department, Belgium. 3~nterdisciplinary Research Center, KULeuven Campus Kortrijk, Belgium Abstract The interaction of (in)homogeneous plane waves with a singly corrugated surface has been tackled before. It was shown that inhomogeneous waves are the only kind of waves that are able to really stimulate leaky critical waves, such as leaky Rayleigh waves, while plane waves are the only waves that can actually stimulate Scholte - Stoneley waves. Recently, a model is developed that describes the interaction of (in)homogeneous plane waves with a doubly corrugated surface ('egg crate'). However, since plane waves extend to infinity, they cannot exist in reality, whence it

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