THEORETICAL ANALYSIS AND NUMERICAL MODELING OF ELASTIC WAVE PROPAGATION IN HONEYCOMB-TYPE THIN LAYER

The present work is devoted to a theoretical analysis and numerical modeling of the phenomena of high-frequency wave propagation in honeycomb-type periodic media. A one- dimensional periodic elastic rod model and a two-dimensional periodic elastic beam hexagonal model are considered. The Bloch wave direct and inverse transformations are applied to find general or particular solutions. By identifying eigenfrequencies and the corresponding eigen- modes of the periodic systems, important information, such as the frequency bandgaps and the diffracted waves caused by the periodic cells, is obtained. The aims are to improve our under- standing of how HF waves are transmitted and attenuated in the studied periodic media and to link the theoretical analyses to our numerical assessments.