.. _V2.02.011:

**v2.02.011** SDLL11 - Free-free thin circular ring
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**Summary:**

This test case makes it possible to test the frequencies and vibration modes of a free-free circular ring.

Eight models are carried out, for each of them the modeling and the type of mesh tested are specified.

The natural frequency search method used is the Sorensen method for the A, B, C, C, D, E, F, G, K models and the Lanczos method for the I modeling.


* 3D models


    * Modeling :math:`A`: mesh HEXA20


    * Modeling :math:`B`: mesh HEXA8


    * Modeling :math:`C`: mesh PENTA15


    * Modeling :math:`D`: mesh TETRA10


* Modeling POU_D_T


    * Modeling :math:`E`: mesh SEG2


* 2D modeling


    * Modeling :math:`F`: mesh QUAD8


    * Modeling :math:`G`: mesh QUAD8


    * Modeling :math:`I`: mesh QUAD8


* Modeling COQUE_SOLIDE


    * modeling :math:`K`: mesh HEXA9


.. toctree::
    :hidden:

    self

.. toctree::
    :maxdepth: 2
    :numbered:

    Probl_me_de_r_f_rence
    Solution_de_r_f_rence
    Mod_lisation_A
    Mod_lisation_B
    Mod_lisation_C
    Mod_lisation_D
    Mod_lisation_E
    Mod_lisation_F
    Mod_lisation_G
    Mod_lisation_I
    Mod_lisation_K
    Synth_se_des_r_sultats