Title: Fft-based spectral-analysis methodology for one-dimensional wave-propagation in poroelastic media
Authors: Degrande, Geert ×
De Roeck, Guido #
Issue Date: Jan-1992
Publisher: Kluwer academic publ
Series Title: Transport in porous media vol:9 issue:1-2 pages:85-97
Abstract: The general one-dimensional equilibrium equations describing the dynamic behaviour of a porous medium form a system of coupled hyperbolic partial differential equations. A transition from the time to the frequency domain is made by spectral decomposition of the displacements. The equations simplify to a set of coupled ordinary differential equations. A solution can be obtained by solving a frequency-dependent eigenvalue problem. The characteristic equation clarifies the double wave-pattern and the attenuation of each wave. A spectrally formulated element uses the frequency-dependent eivenvectors as shape functions. The mass distribution is treated exactly without the need of subdividing a member into smaller elements and therefore wave propagation within an element is also treated exactly.
ISSN: 0169-3913
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Structural Mechanics Section
× corresponding author
# (joint) last author

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