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


Geometry
---------


.. image:: images/Object_1.svg
    :width: 347
    :height: 381


.. _RefImage_Object_1.svg:

**Shell features:**


* thickness h=0.05m,


* radius of curvature R=1.m


* width= AB= CD=0.1m,


* angle :math:`\alpha` is chosen as


.. image:: images/Object_3.svg
    :width: 347
    :height: 381


.. _RefImage_Object_3.svg:

**Note:** the geometry is very flat in :math:`(\mathit{xy})`


Material properties
----------------------

The properties of the material constituting the plate are:


.. csv-table::

    ":math:`E=2.E+11\mathit{Pa}` ", "Young's module"
    ":math:`\nu =\mathrm{0,3}` ", "Poisson's ratio"
    ":math:`\rho =7800.\mathit{kg}\mathrm{.}{m}^{-3}` ", "Density"



Boundary conditions and loads
-------------------------------------

No boundary conditions: free-free dynamic analysis


Initial conditions
--------------------

Not applicable