.. _V2.04.105:

**v2.04.105** SDLV105 — Modal analysis of a main primary circuit with IFS
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**Summary:**

This test carries out the modal analysis of a primary circuit taking into account fluid-structure interaction.

The following models are presented:


* modeling A: modal analysis by dynamic substructuring (see [:ref:`U2.07.07 <U2.07.07>`] for a description of the methodology);


* B modeling: modal analysis of the global problem with elimination of Lagrange multipliers (see [:ref:`R3.03.05 <R3.03.05>`] for a description of the methodology).


.. toctree::
    :hidden:

    self

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

    Introduction
    Mod_lisation_A
    Mod_lisation_B