Code_Aster
®
Version
7.4
Titrate:
Modeling
3d_ABSO
Date:
01/06/05
Author (S):
G. DEVESA, F. LEBOUVIER
Key
:
U3.14.09-C
Page
:
1/2
Instruction manual
U3.14 booklet: Mechanical finite elements 3D
HT-66/05/004/A
Organization (S):
EDF-R & D/AMA, DeltaCAD
Instruction manual
U3.14 booklet: Mechanical finite elements 3D
Document: U3.14.09
Modeling
3d_ABSO
Summary:
This document describes for modeling
3d_ABSO
:
·
degrees of freedom carried by the finite elements which support modeling,
·
the related meshs supports,
·
supported loadings,
·
nonlinear possibilities,
·
case-tests implementing modelings.
Modeling
3d_ABSO
(Phenomenon:
MECHANICS
) corresponds to finite elements of which meshs
supports are surface. They make it possible to take into account the condition of absorbing border of volumes
solids.
Code_Aster
®
Version
7.4
Titrate:
Modeling
3d_ABSO
Date:
01/06/05
Author (S):
G. DEVESA, F. LEBOUVIER
Key
:
U3.14.09-C
Page
:
2/2
Instruction manual
U3.14 booklet: Mechanical finite elements 3D
HT-66/05/004/A
1 Discretization
1.1
Degrees of freedom
Modeling
Degrees of freedom (with each node node)
3d_ABSO
DX
: following displacement
X
DY
: following displacement
Y
DZ
: following displacement
Z
1.2
Meshs supports of the matrices of rigidity
The meshs supports of the finite elements can be quadrangles or triangles. Elements
are isoparametric.
Modeling Nets Interpolation
Remarks
3d_ABSO TRIA3
linear
TRIA6
quadratic
QUAD4
linear
QUAD8
QUAD9
quadratic
1.3
Meshs supports of the loadings
The same ones as previously.
2 Loadings
supported
The loading available is as follows:
·
“ONDE_PLANE”
Allows to impose a seismic loading by plane wave.
3 Possibilities
non-linear
3.1
Laws of behaviors
The only relation of behavior, available under
DYNA_NON_LINE
, for this modeling, under
COMP_INCR
is the relation
“ELAS”
.
3.2 Deformations
Only linearized deformations key word
“SMALL”
under
DEFORMATION
are available.
4
Examples of implementation: case-tests
·
Non-linear dynamics
SDLV120A [V2.04.120]: Analyze propagation of a wave of compression in a bar
infinite rubber band (absorption of the wave at the border of the mesh).
SDLV121A [V2.04.121]: Propagation, reflection and absorption of a wave plane in a solid mass
modelized in the shape of a column 1D.