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


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

The characteristics used and the mesh are those deduced from the data in paragraph [:ref:`1 <1>`].

We assign a 3D model to the elements of the structure


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

The mesh provided to Code\ _\ *Aster* contains HEXA8 meshes to model the structure and QUAD4 meshes to model interfaces with detailed discretization in paragraph [:ref:`1.1 <1.1>`]. It is important to have oriented the surface elements of the interfaces according to the conventions described in document [:ref:`U2.06.08 <U2.06.08>`].


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

The values tested are the modules in :math:`m` of the responses to points :math:`A` (equatorial) and :math:`C` (polar) for the external radius of 7 meters.


.. csv-table::

    "**Identification**", "**Reference type**", "**Reference**", "**Tolerance**"
    ":math:`\mathrm{MDXA}` (:math:`1\mathrm{Hz}`)", "Non-regression", "2.433100E-04"," 0.1%"
    ":math:`\mathrm{MDZC}` (:math:`21\mathrm{Hz}`)", "Non-regression", "0.01679100"," 0.1%"
    ":math:`\mathrm{MDXA}` (:math:`1\mathrm{Hz}`)", "External Source", "2.648E-04"," 9.0%"