Modeling
============


Characteristics of the mesh
----------------------------

The mesh consists of 5 knots, 4 SEG2 stitches and 2 POI1 stitches.


Characteristics of modeling
-----------------------------------

The system is modelled by:


* 4 discrete elements DIS_T with K_T_D_L characteristics,


* 2 discrete DIS_T elements with M_T_D_N characteristics.


Modeling parameters
--------------------------


Modeling A
~~~~~~~~~~~~~~~

Calculation of static modes for the movements of points :math:`\mathrm{NO1}`, :math:`\mathrm{NO3}` and :math:`\mathrm{NO5}`.

Spectral modal response with multiple uncorrelated supports on the first 2 modes without static correction (combination of modal responses SRSS), without damping.


B modeling
~~~~~~~~~~~~~~~

Calculation of static modes for the movements of points :math:`\mathrm{NO1}`, :math:`\mathrm{NO3}` and :math:`\mathrm{NO5}`.

Answer to DDS with different combination rules:


*
    * **Calculation** **1:** **Combination** **decorrelated support groups with DDS equal intra-group:**

Load cases must be defined by supports (and not by support group). The absolute value combination is used for intra-group accumulation and the quadratic combination for inter-group accumulation.

Results of the occurrences of the keyword DEPL_MULT_APPUI:

- case 1: N01 with DX = -0.04 m

- case 2: N03 with DX = -0.04 m

- case 3: N05 with DX = 0.06 m

Answer produced by the tag COMB_DEPL_APPUI:

- List of cases: case 1, case 2 and case 3

- Rule for combining cases 1 and 2: absolute value (TYPE_COMBI =' ABS ',)

- Global combination rule: Quadratic


*
    *Calculation 2:C**linear combination** within-group and inter-group

Result of occurrences of the keyword DEPL_MULT_APPUI:

- case 1: group 1 with DX = -0.04 m

- case 2: group 2 with DX = 0.06 m

Answer produced by the tag COMB_DEPL_APPUI:

- List of cases: case 1 and case 2

- Combination rule: Linear (TYPE_COMBI =' LINE ',)


*
    *Calculation 3: Intra-group and inter-group**quadratic combination**

Result of occurrences of the keyword DEPL_MULT_APPUI:

- case 1: group1 with DX = -0.04 m

- case 2: group 2 with DX = 0.06m

Answer produced by the tag COMB_DEPL_APPUI:

- List of cases: case 1 and case 2

- Combination rule: Quadratic (TYPE_COMBI =' QUAD ',)