2. Modeling A#
2.1. Characteristics of the mesh#
The structure is modelled by a regular “2D” mesh composed of \(600\times 150\) QUA4 (see).
Figure 2.1-1 : Mesh
2.2. Model#
The model adopted is based on isotropic elastic mechanical modeling.
The geometry is meshed by finite elements such as thin shells DKT.
The supporting geometric elements are linear quadrangles.
2.3. Combinations#
The coefficients in the combination table are generated randomly. The number of combinations was set at 240.
2.4. Call to order#
2.4.1. Format “RESULTAT”#
The command takes directly as arguments the “RESULTAT” objects corresponding to the three loads to be combined [from commands MACRO_ELAS_MULT and MECA_STATIQUE, and COMB_SISM_MODAL].
The coefficients of the combinations are defined using a random draw.
As an output, a multiple “RESULTAT” object [mult_elas] will also be retrieved, with 240 order numbers (combinations).
2.4.2. Format “TABLE”#
The command takes directly as arguments the “RESULTAT” objects corresponding to the two loads to be combined [from commands MACRO_ELAS_MULT and MECA_STATIQUE].
The result fields are first transformed into tables using the CALC_COUPURE command, returning a resulting value extracted in the middle of the plate thickness.
Passing these tables as arguments, the POST_COMBINAISON command returns an “TABLE” object with 20 order numbers/rows.
2.5. Tested sizes and results#
2.5.1. Format “RESULTAT”#
Node group |
Field |
Component |
Order Number |
Analytical Value |
Tolerance (%) |
|
N11 |
|
DX |
1 |
0.01319840304488631 |
0, 1 |
|
N12 |
|
DX |
1 |
1 |
0.020849165865937627 |
0, 1 |
2.5.2. Format “TABLE” with “RESULTANTE”#
NOM_CAS |
INTITULE |
NOM_PARA |
Analytical value |
Tolerance (%) |
|
C1.1 |
3 m cut |
N |
-9.264901369305697E-06 |
0.1 |
|
C2.4 |
3 m cut |
VPL |
-123508.52766947303 |
0.1 |