Elastic Wave Behaviour in 2-D Acoustic Interface Superlattices of an Altered Phase

• Autorzy: Kapelewski J. , Lila B.
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

acoustic antennas; elastic layers; interfaces

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2011
• Tom: Vol. 36, No. 3
• Strony: 603--611
• Opis fizyczny: Bibliogr. 10 poz,. wykr.

Twórcy

autor

Kapelewski J.

autor

Lila B.

• Military University of Technology Faculty of Electronics Institute of Radioelectronics Kaliskiego 2, 00-908 Warszawa 49, Poland,

Bibliografia

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