3. Modeling A#

3.1. Characteristics of modeling#

MEC3QU9H (degenerate 3D shell)

_images/Object_6.svg

modeling COQUE_3D - regular mesh.

3.2. Characteristics of the mesh#

Number of knots: 33

Number of meshes and type: 10 QUAD9

3.3. Tested features#

  • The geometric nonlinear element COQUE_3D,

  • The static algorithm for updating large rotations GROT_GDEP from STAT_NON_LINE,

  • The use of a follower pressure.

3.4. Results of modeling A#

History of horizontal displacement \(\mathit{DX}\) (\(m\)) in the middle of \(\mathit{P1P2}\)

Moment

Press \(p\)

Reference (Samcef)

—9.03743E+00

—1.41513E+01

Story of vertical displacement \(\mathit{DZ}\) (m) in the middle of \(\mathit{P1P2}\)

Moment

Press \(P\)

Reference (Samcef)

—8.42753E+00

—4.43375E+00

History of the horizontal rotation \(\mathit{DRY}\) in the middle of \(\mathit{P1P2}\)

Moment

Press \(p\)

Reference (Samcef)

1.94328E+00

3.09814E+00

3.5. notes#

The number of cells in the reference solution is 2 times greater than that of the modeling A solution.

We use the value of COEF_RIGI_DRZ = 0.001.

The following figures illustrate the solution obtained with a non-follower and follower pressure. These are the translation components of the middle of the free end.

_images/1000000000000316000003FE219CEEDF612F363D.png

Non-tracking pressure

 _images/1000000000000316000003FEA7044F10381634B8.png

Follower pressure

We can see that in the case of a subsequent pressure, the displacement \(\mathit{DZ}\) decreases after reaching a maximum. The beam has a tendency to roll up. This phenomenon cannot be represented with unsteady pressures.