2. Modeling A

2.1. Characteristics of the mesh

The structure is modelled by a regular mesh composed of \(120\times 40=6800\) QUA4 (see).

Figure 2.1-1: Meshing

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

Combinations are defined in the ssls12a.38 file

Combination (CMB)	Coefficient result 1 ( G )	Coefficient result 2 ( Q )	Coefficient result 2 ( E )) **
C1	1.35	0.12	0
C2	0.5	0	0
C3	-0.41	0.1414	0
C4	1	-0.63	0
C5	0.6	0.5	0.8

The result1 comes from the command MACRO_ELAS_MULT ** whose arguments are the 3 load cases of load 1 [applied separately].

The result 2 comes from the command MECA_STATIQUE ** with loading 2 as an argument.

Result 3 comes from the command COMB_SISM_MODAL ** with the CQC combination.

Since the result 2 has 3 order numbers (one per load case) and the result 3 has 12 output fields (see the documentation U4.84.01 on COMB_SISM_MODAL), 46 combinations will be calculated by the command POST_COMBINAISON **.

2.3 Call to order

2.3.1 “RESULTAT “

The command takes directly as arguments the “RESULTAT” objects corresponding to the two loads to be combined [from commands MACRO_ELAS_MULT, MECA_STATIQUE and COMB_SISM_MODAL].

A multiple [mult_elas] “RESULTAT” object will also be retrieved as an output, with 46 order numbers.

2.4. Tested sizes and results

The reference values are evaluated using a python syntax in the command file. The values are calculated from the values extracted from the nodes or elements of the result fields combined with the values in the coefficient table according to the formulation in Chapter 1.

These are tests on the movements (DEPL) of the first 100 knots. All components, all combinations and the first 3 order numbers are tested.