@ARTICLE{Kapelewski_Jerzy_Elastic_2011, author={Kapelewski, Jerzy and Lila, Bogdan}, volume={vol. 36}, number={No 3}, journal={Archives of Acoustics}, pages={603-611}, howpublished={online}, year={2011}, publisher={Polish Academy of Sciences, Institute of Fundamental Technological Research, Committee on Acoustics}, abstract={The purpose of the paper is to outline a systematic and unified non-local treatment of mode conversion effects associated with an interface superlattice being a 2D pseudo-array composed of altered phase inclusions (exemplified by impurity clusters) and located at a solid-solid plane interface. It will be illustrated, in some detail, for the instructive case of a Stoneley type acoustic wave (SW), incident on a periodically nonhomogeneous portion of an interface and partly transformed into bulk modes propagating in one of the component solid. An analytical model scheme is constructed, using a variational method combined with the T matrix approach, appropriate for the 2D periodic array treated, and decaying into the depth of this solid for the structure in a way determined by the array geometry and element 3D profiles as well as the boundary conditions at the interface. An apodization (weighting) to reduce the side-lobes level is incorporated into the structure by appropriately varying lateral dimensions and the depth of particular scatterers.}, type={Artykuły / Articles}, title={Elastic Wave Behaviour in 2-D Acoustic Interface Superlattices of an Altered Phase}, URL={http://journals.pan.pl/Content/104438/PDF/08_paper.pdf}, doi={10.2478/v10168-011-0042-8}, keywords={acoustic antennas, elastic layers, interfaces}, }