Guided Waves Attenuation in Water Immersed Corrugated Plates
2015
Abstract Influences of surface corrugations on the propagation of guided waves along an immersed elastic plate are investigated. The Finite Elements Method is used to compute the reflected and transmitted pressure fields for oblique incident plane harmonic waves in a selected frequency range. The effects of corrugations can also be accounted by means of a rheological model. The corrugated surface is then modeled by using modified boundary conditions at the liquid – corrugated plate interface. In this condition a parameter is introduced that can be evaluated by a fit procedure between the analytical solutions of modal resonance peaks and the FEM results for the corrugated plate.
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