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

Geometry
---------


.. image:: images/10001278000069BB000074E41BDEEB29CD9E3FD5.svg
    :width: 240
    :height: 266


.. _RefImage_10001278000069BB000074E41BDEEB29CD9E3FD5.svg:

Direction of travel: :math:`\theta =45°` in the :math:`\mathrm{XY}` plane


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


.. csv-table::

    "Spring stiffness:", ":math:`k=10000N/m`"
    "Point mass:", ":math:`m=1\mathrm{kg}`"
    "Gravity:", ":math:`g=10m/{s}^{2}`"
    "Coulomb coefficient:", ":math:`\mu =\mathrm{0,1}`"



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

The system is based on plane :math:`Z=0` on which it can slide with a Coulomb coefficient of friction of :math:`\mu =\mathrm{0,1}`.


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

Initial displacement of the mass: :math:`{r}_{0}=\mathrm{0,85}\mathrm{mm}` in the :math:`\theta` direction.

Zero initial speed.