.. _v5.01.111-probleme_reference:


Reference problem
=====================

Geometry A
-----------

The geometry is shown in the figure below:

.. figure:: figures/v5.01.111_schema_01.png
    :width: 70%
 :align: center
    :name: reference_schema_01

    Geometry of the reference problem.


The geometry is made up of:

* 10 discretes such as "DIS_T_D_N". Four undeformable solids are represented by 4 :math:`\color{red}{\blacklozenge}` and 1 :math:`\color{green}{\blacklozenge}`, which are connected with a "LIAISON_SOLIDE". The :math:`\color{red}{\blacklozenge}` are "DIS_T_D_N", the :math:`\color{green}{\blacklozenge}` are "DIS_TR_D_L".
* 2 discretes of the type "DIS_T_D_L" to represent the shock discretes :math:`\color{blue}{━━━}` in the global coordinate system.
* 8 discretes of the type "DIS_T_D_L" to represent shock discretes :math:`\color{fuchsia}{━━━}` in their local coordinate system.


Loads
-----------

Boundary conditions
^^^^^^^^^^^^^^^^^^^^^^^^^^
The centers of the 4 undeformable solids represented by a :math:`\color{green}{\blacklozenge}` are affected by a "DIS_TR_D_L" of which one of the nodes is embedded, the other being connected to 4 :math:`\color{red}{\blacklozenge}`.

We apply the displacements to the center of solid :math:`A`.