Summary of results
======================

**Modeling** COQUE_3D

The results obtained are satisfactory. Uncertainties about critical pressure do not exceed:


* :math:`\text{10.71\%}` with TRIA7 meshes,


* :math:`\text{2.3\%}` with QUAD9 meshes.

The modal deformation obtained corresponds well to the expected circumferential mode: :math:`n\mathrm{=}8` for both models.

It can be seen that modeling COQUE_3D with mesh QUAD9 is more accurate than modeling COQUE_3D with mesh TRIA7.

**Modeling** DKT

The results obtained are satisfactory for plate elements. Uncertainties about critical pressure do not exceed :math:`\text{12.5\%}` regardless of the mesh (QUAD4, TRIA3).

The modal deformation obtained corresponds well to the expected circumferential mode: :math:`n=8` for both models.

This test made it possible to test models COQUE_3D and DKT in linear Euler buckling of a thin structure subjected to external pressure.