Dynamic wave propagation in infinite saturated porous media half spaces |
| |
Authors: | Y Heider B Markert W Ehlers |
| |
Affiliation: | 1.Institute of Applied Mechanics (CE),University of Stuttgart,Stuttgart,Germany |
| |
Abstract: | From a macroscopic perspective, saturated porous materials like soils represent volumetrically interacting solid–fluid aggregates.
They can be properly modelled using continuum porous media theories accounting for both solid-matrix deformation and pore-fluid
flow. The dynamic excitation of such multi-phase materials gives rise to different types of travelling waves, where it is
of common interest to adequately describe their propagation through unbounded domains. This poses challenges for the numerical
treatment and demands special solution strategies that avoid artificial and numerically-induced perturbations or interferences.
The present paper is concerned with the accurate and stable numerical solution of dynamic wave propagation problems in infinite
half spaces. Proceeding from an isothermal, biphasic, linear poroelasticity model with incompressible constituents, finite
elements are used to discretise the near field and infinite elements to approximate the far field. The transient propagation
of the poroacoustic body waves to the infinity is thereby modelled by a viscous damping boundary, which, for stability reasons,
necessitates an appropriate treatment of the included velocity-dependent damping forces. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|