Abstract
Having developed the response equations for in‐plane and bending waves in a thick L‐shaped plate structure of infinite extent (Noise‐Con 88), when both plates are of the same thickness and material, the analysis is now extended to plates of different thicknesses. In this study, instead of the L‐plate configuration, a flat plate with a step discontinuity is investigated. The boundary between the two plates is excited by a Mindlin bending wave at some arbitrary angle of incidence. In this paper, the complete thick plate solution for the transmitted and reflected waves is obtained using Mindlin's equations to describe the plate flexure, and including the generation of in‐plane shear and in‐plane longitudinal waves at the junction. The solution is obtained for different angles of incidence and different step configurations. The results that will be presented are for the total transmitted power and the power transmitted by the individual wave components, averaged over all angles of incidence, as a function of the plate step discontinuity.
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