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


System description
----------------------

We consider the system represented by the diagram below:


.. image:: images/100000000000016C000000883EAC8ABEB4312C3E.png
    :width: 2.8217in
    :height: 1.0709in


.. _RefImage_100000000000016C000000883EAC8ABEB4312C3E.png:


Masses and stiffness
------------------

The three springs have the same stiffness: :math:`k=1000N/m`.

Both masses are equal to :math:`m=10\mathrm{kg}`.


Boundary conditions and loading
------------------------------------

Both ends are recessed.

The load is an axial tensile force applied to mass :math:`\mathrm{m1}`, sinusoidal as a function of time, with pulsation :math:`\omega`.