C modeling
==============


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


.. image:: images/Object_13.svg
    :width: 624
    :height: 212


.. _RefImage_Object_13.svg:

**Figure** 5.1-1

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

Number of knots: 85

Number of meshes and types: 28 SEG4


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

Uncertainties about the results using the analytical reference solution:

.. csv-table::

    "**Identification**", "**Reference**", "**Tolerance**"
    "Frequency (:math:`\mathit{Hz}`) Transverse 1", "17.9"," 3.0%"
    "Frequency (:math:`\mathit{Hz}`) in plane 1", "24.8"," 3.0%"
    "Frequency (:math:`\mathit{Hz}`) Transverse 2", "25.3", "3, 0%"
    "Frequency (:math:`\mathit{Hz}`) in plane 2", "27.0", "3, 0%"


Table 5.3-1

notes
---------

The mesh in SEG4 is obtained from a SEG3 mesh with the command CREA_MAILLAGE, MODI_MAILLE with the option 'SEG3_4'. It is important that the middle node of SEG3 is in the middle, *Code_Aster* checks this condition with a tolerance.