Modeling A
==============


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


.. image:: images/1000000000000181000002BA15B2A2B6830E8138.png
    :width: 2.1575in
    :height: 3.9366in


.. _RefImage_1000000000000181000002BA15B2A2B6830E8138.png:

**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 :math:`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).


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

Number of knots: 2822

Number of meshes and types: 64 TRIA3, 1280 QUAD4, 1280, 512 PENTA6 and 2048 HEXA8


Tested sizes and results
------------------------------


.. csv-table::

    "Identification", "Reference Value", "Reference Type", "Tolerance (%)"
    "Mode 1", ":math:`71.2` ", "'SOURCE_EXTERNE'", ":math:`4.6`"
    "Mode 2"," :math:`77.4` ", "'SOURCE_EXTERNE'", ":math:`3.5`"
    "Mode 3"," :math:`98.8` ", "'SOURCE_EXTERNE'", ":math:`5.4`"
    "Mode 4"," :math:`133.4` ", "'SOURCE_EXTERNE'", ":math:`2.0`"
    "Fashion 5"," :math:`147.8` ", "'SOURCE_EXTERNE'", ":math:`6.5`"
    "Fashion 6"," :math:`212.6` ", "'SOURCE_EXTERNE'", ":math:`7.7`"