.. _V2.02.129:

**v2.02.129** SDLL129 - Beam with 3 disks and 2 bearings with variable characteristics depending on the speed of rotation
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**Summary:**

This test makes it possible to validate the calculation of the rotation modes of a rotating shaft system with the command CALC_MODE_ROTATION in the case where the stiffness and damping characteristics depend on the speed of rotation.

In this test, we have a rotor model with three disks, supported by two hydrodynamic bearings, whose stiffness and damping matrices are non-symmetric and depend on the speed of rotation. This example and the corresponding reference results are taken from the qualification manual for ROTORINSA, [:ref:`bib2 <bib2>`], a finite element software designed to predict the dynamic behavior of rotors under bending.

A good agreement is observed between the results of*Code_Aster* and the reference solution.


.. toctree::
    :hidden:

    self

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

    Probl_me_de_r_f_rence
    Solution_de_r_f_rence
    Mod_lisation_A
    Synth_se_des_r_sultats