Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
An Argument in Support of FE Discretizations of Unbounded Media
Submission Author:
Josue Labaki , SP
Co-Authors:
Cassiano Bueno, Josue Labaki
Presenter: Josue Labaki
doi://10.26678/ABCM.COBEM2019.COB2019-1545
Abstract
This work compares finite and boundary element discretizations of unbounded media in terms of their compliance to Sommerfeld’s Radiation Condition (SRC). The SRC poses a problem for the modeling of such media with finite element discretizations, since by definition they can only discretize finite domains. However, in practical applications in which the medium has some material damping, waves naturally dissipate away from the excitation source. This work compares an SRC-satisfying boundary element discretization of a viscoelastic half-space with a finite hemisphere discretized by finite elements. The results show that the size of the finite hemisphere in which violation of SRC is negligible is much smaller than initially thought.
Keywords
Sommerfeld Radiation Condition, Unbounded Media, wave propagation, Dynamic Soil Structure Interaction
