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


Geometry
---------

The following system is considered:


.. image:: images/10000000000003EA000002815DF12D6AF93D41FA.png
    :width: 3.5165in
    :height: 2.298in


.. _RefImage_10000000000003EA000002815DF12D6AF93D41FA.png:


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

The characteristics of the system are:


* :math:`{k}_{1}={k}_{2}=1N/m`


* :math:`{m}_{1}={m}_{2}=1\mathit{kg}`


* :math:`e=1m`


* :math:`K=30N/m`


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

The left edge of the system is fixed and the masses move along the axis of the springs.


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

We try to follow the evolution of the periodic solution from the second mode of the underlying linear system (contactless system).