B modeling
==============


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

Modeling with elements of BARRE and CABLE.


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

The mesh contains:


* 2 elements of type BARRE.


* 60 elements of type CABLE. (15 elements per cable).


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

We test the 1st natural vibration frequency of the cables. The DYNA_NON_LINE operator with the MODE_VIBR option does not allow you to know the following ones. It is a non-regression test.


.. csv-table::

    "**No**", "**Reference type**", "**Calculated value**", "**Tolerance**"
    "10", "'NON_REGRESSION'", ":math:`62.7962\mathit{Hz}` ", "default"
    "20", "'NON_REGRESSION'", ":math:`88.5701\mathit{Hz}` ", "default"


Note: For the record, the reference vibration frequencies are: :math:`62.732270963\mathit{Hz}` and :math:`88.728308982\mathit{Hz}`


notes
---------

The calculation is carried out with the operator DYNA_NON_LINE, with the keyword factor MODE_VIBR. The operator only makes it possible to know a single frequency which is displayed in the message file and stored in the parameter FREQ of the data structure produced by the operator. That's why it's a non-regression test.