3. Modeling#
3.1. Characteristics of the mesh#
The mesh consists of 5 knots, 4 SEG2 stitches and 2 POI1 stitches.
3.2. 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.
3.3. Modeling parameters#
3.3.1. Modeling A#
Calculation of static modes for the movements of points \(\mathrm{NO1}\), \(\mathrm{NO3}\) and \(\mathrm{NO5}\).
Spectral modal response with multiple uncorrelated supports on the first 2 modes without static correction (combination of modal responses SRSS), without damping.
3.3.2. B modeling#
Calculation of static modes for the movements of points \(\mathrm{NO1}\), \(\mathrm{NO3}\) and \(\mathrm{NO5}\).
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 “,)