5. C modeling#
5.1. Characteristics of modeling#
The beam is meshed with elements of type POU_D_E.
The transitory problem is solved directly on various types of projection bases.
The problem is addressed for four types of projection:
on a base composed of the first 5 normal modes;
on a base composed of the first 5 normal modes enriched with a static mode;
on a base composed of the first 5 normal modes enriched with a static mode and orthogonalization of the base with respect to the stiffness matrix using the operand ORTHO =” OUI “of DEFI_BASE_MODALE;
on a base composed of the first 5 normal modes enriched with a static mode and orthogonalization of the base with respect to the stiffness matrix using the ORTHO_BASE operand from DEFI_BASE_MODALE.
5.2. Characteristics of the mesh#
Number of knots: 11
Number of meshes and types: 10 SEG2
5.3. Observed values#
Identification |
Reference |
Tolerance |
Base without static modes |
||
Displacement (\(m\)) |
\(-1.85334E-06\) |
|
Speed (\({\mathrm{m.s}}^{-1}\)) |
\(-4.63284E-03\) |
|
Base with static modes |
||
Displacement (\(m\)) |
\(-1.85334E-06\) |
|
Speed (\({\mathrm{m.s}}^{-1}\)) |
\(-4.63284E-03\) |
|
Base with static mode + ORTHO =” OUI “ |
||
Displacement (\(m\)) |
\(-1.85334E-06\) |
|
Speed (\({\mathrm{m.s}}^{-1}\)) |
\(-4.63284E-03\) |
|
Base with static mode + ORTHO_BASE |
||
Displacement (\(m\)) |
\(-1.85334E-06\) |
|
Speed (\({\mathrm{m.s}}^{-1}\)) |
\(-4.63284E-03\) |
|