.. _U3.33.01:

**u3.33.01** 3D and PLAN models of the ACOUSTIQUE phenomenon
=============================================================

**Summary:**

This document describes for 3D models and PLAN:


* the degrees of freedom carried by the finite elements that support modeling,


* the related support meshes,


* the materials and loads supported,


* calculation options for elementary matrices and post treatments,


* non-linear possibilities as well as fracture mechanics options if they exist.

The 3D models and PLAN (Phenomenon: ACOUSTIQUE) correspond to acoustic finite elements in pressure formulation (cf. [:ref:`R4.02.01 <R4.02.01>`]). 3D modeling has solid support meshes, modeling PLAN has flat support meshes.


.. toctree::
    :hidden:

    self

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

    Discr_tisation
    Signification_des_symboles
    Mat_riaux_support_s
    Chargements_support_s
    Possibilit_s_non-lin_aires
    Calculs_de_matrices__l_mentaires
    Post-traitement_du_calcul