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


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

**Discreet element of translational rigidity**


.. image:: images/Object_10.svg
    :width: 264
    :height: 180


.. _RefImage_Object_10.svg:

Characteristics of the elements

.. csv-table::

    "DISCRET:", "with nodal masses", "M_T_D_N"
    "", "and stiffness matrices", "K_T_D_L"


Boundary conditions:

.. csv-table::

    "in all nodes", "DDL_IMPO:", "(TOUT: 'OUI' DY: 0., DZ: 0.)"
    "at the end node :math:`A` ", "", "(GROUP_NO: A DX: 0.)"


Node names:

.. csv-table::

    ":math:`\mathit{Point}A\mathrm{=}\mathit{N1}` "," :math:`A\mathrm{=}\mathit{N1}`"
    ":math:`\mathit{Point}B\mathrm{=}\mathit{N2}` "," :math:`B\mathrm{=}\mathit{N2}`"
    ":math:`\mathit{Point}C\mathrm{=}\mathit{N3}` "," :math:`C\mathrm{=}\mathit{N3}`"



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

Number of knots: 3

Number of meshes and types: 2 SEG2


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

Natural frequencies and reduced damping.

Natural frequencies:


.. csv-table::

    "**Order Number**", "**Reference**", "**Aster**", "**% Difference**"
    "1", "6.4537", "6.44568", "—0.124"
    "2", "15.5806", "1.55612", "—0.124"


Reduced amortization:


.. csv-table::

    "**Order Number**", "**Reference**", "**Aster**", "**% Difference**"
    "1", "0.05", "0.05", "—1.39E-14"
    "2", "0.05", "0.05", "2.78E-14"