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RESEARCH PAPERS

A Spectral Element Approach to Wave Motion in Layered Solids

[+] Author and Article Information
S. A. Rizzi

Structural Acoustics Branch, NASA Langley Research Center, Hampton, VA 23665-5225

J. F. Doyle

School of Aeronautics and Astronautics, Purdue University, West Lafayette, IN 47907

J. Vib. Acoust 114(4), 569-577 (Oct 01, 1992) (9 pages) doi:10.1115/1.2930300 History: Received November 01, 1990; Online June 17, 2008

Abstract

A matrix methodology similar to that of the finite element method is developed for the analysis of stress waves in layered solids. Because the mass distribution is modeled exactly, the approach gives the exact frequency response of each layer. The fast Fourier transform and Fourier series are used for inversion to the time/space domain. The impact of a structured medium with multiple layers is used to demonstrate the method. Comparison with existing propagator and direct global matrix methods show the present approach to be computationally more efficient.

Copyright © 1992 by The American Society of Mechanical Engineers
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