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


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

TUYAU and TUYAU_6M.


.. image:: images/1000275C00001BA400001BA781CFAF3E917057B7.svg
    :width: 255
    :height: 271


.. _RefImage_1000275C00001BA400001BA781CFAF3E917057B7.svg:

The discretized geometry on the axis of the ring is shown above. The elements TUYAU and TUYAU_6M are 3-knot meshes of type SEG3 representing the axis of the ring. The number of nodes on the axis is 5.


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

Number of knots: 5

Number of meshes and type: 2 SEG3


Tested values
---------------

(Frequencies in hertz)


.. csv-table::

    "**Mode**", "**Reference**", "**Aster** **** TUYAU **", "**% difference**", "**Aster**** TUYAU_6M **", "**% difference**"
    "ovalization", "210.55
    210.55", "209.02
    209.02", "—0.72
    —0.72", "209.02
    209.02", "—0.72
    —0.72"
    "trifoliate", "587.92
    587.92", "591.00
    591.00", "0.52
    0.52", "591.00
    591.00", "0.52
    0.52"
    "off plan", "205.89
    205.89
    588.88
    588.88", "259.74
    259.74
    649.57
    649.57", "26.15
    26.15
    10.31
    10.31", "259.74
    259.74
    649.57
    649.57", "26.15
    26.15
    10.31
    10.31"



notes
---------

The models in TUYAU (limited by construction to 3 Fourier modes) and TUYAU_6M do not allow the out-of-plane modes to be represented correctly. On the other hand, they provide the same results on plane modes, close to the reference.