F modeling
==============

Characteristics of modeling
------------------------

In this modeling, we use the operator DYNA_VIBRA (see [:ref:`U4.53.03 <U4.53.03>`]) with the relationship DIS_CHOC. The integration diagram is DEVOGE.

This modeling corresponds to the D modeling, in which the AMOR_REDUIT option is activated to test the value of AMOR_TAN is well calculated. The rest of the data layout remains the same as the D modeling.

AMOR_MODAL =_F (AMOR_REDUIT =0.01,),


Characteristics of the mesh
----------------------------

Number of knots: 2

Number of meshes and types: 2 POI1


Tested sizes and results
------------------------------

Values of the movements in the direction of the oscillator for the approximate times of change in the sign of the speed over the time period :math:`(0;0.2s)`.

.. csv-table::

    "**Identification**", "**moment (s)**", "**Reference** of Non regression"
    ":math:`\mathrm{DY}=\mathrm{r2}\mathrm{cos45}` "," :math:`\pi \times {10}^{-2}` ", "-0.0004839984335835559"
    ":math:`\mathrm{DY}=\mathrm{r3}\mathrm{cos45}` "," :math:`2\pi \times {10}^{-2}` ", "0.00037058423338897446"
    ":math:`\mathrm{DY}=\mathrm{r4}\mathrm{cos45}` "," :math:`3\pi \times {10}^{-2}` ", "-0.0002606802712058347"
    ":math:`\mathrm{DY}=\mathrm{r5}\mathrm{cos45}` "," :math:`4\pi \times {10}^{-2}` ", "0.00015418169719420954"