3. Modeling A#
3.1. Characteristics of modeling A#
Figure 3.1. A modeling mesh**
Only half of the tank is meshed. This model cannot be used to calculate the torsional modes around the \(Z\) axis.
The reservoir is regularly meshed by quadrangular plate elements (modeling DKT). The fluid is meshed by volume fluid elements (3D modeling_ FLUIDE), the upper part is covered by a layer of free surface elements (2D_ FLUI_PESA modeling). The fluid-structure interface is lined with quadrangular coupling elements (modeling FLUI_STRU).
3.2. Characteristics of the mesh#
Number of knots: 2822
Number of meshes and types: 64 TRIA3, 1280 QUAD4, 1280, 512 PENTA6 and 2048 HEXA8
3.3. Tested sizes and results#
Identification |
Reference Value |
Reference Type |
Tolerance (%) |
Mode 1 |
\(71.2\) |
“SOURCE_EXTERNE” |
\(4.6\) |
Mode 2 |
|
“SOURCE_EXTERNE” |
\(3.5\) |
Mode 3 |
|
“SOURCE_EXTERNE” |
\(5.4\) |
Mode 4 |
|
“SOURCE_EXTERNE” |
\(2.0\) |
Fashion 5 |
|
“SOURCE_EXTERNE” |
\(6.5\) |
Fashion 6 |
|
“SOURCE_EXTERNE” |
\(7.7\) |