Autori: M.V. Predoi, M. Castaings, B. Hosten, C. Bacon

Editorial: Journal of the Acoustical Society of America, 121 (4), p.1935-1944, 2007.

Rezumat:

The dispersion curves for guided waves have been of constant interest in the last decades, because
they constitute the starting point for NDE ultrasonic applications. This paper presents an evolution
of the semianalytical finite element method, and gives examples that illustrate new improvements
and their importance for studying the propagation of waves along periodic structures of infinite
width. Periodic boundary conditions are in fact used to model the infinite periodicity of the
geometry in the direction normal to the direction of propagation. This method allows a complete
investigation of the dispersion curves and of displacement / stress fields for guided modes in
anisotropic and absorbing periodic structures. Among other examples, that of a grooved aluminum
plate is theoretically and experimentally investigated, indicating the presence of specific and original
guided modes.

Cuvinte cheie: Acoustics

URL: http://scitation.aip.org/dbt/dbt.jsp?KEY=JASMAN&Volume=121