u4.67.01 Operator DEFI_BASE_REDUITE

The aim of the operator is to build the reduced base from a non-linear calculation (thermal or mechanical) or a parametric linear calculation.

There are two methods:

• For non-linear problems, the operator relies on an sd_result of the evol_ther or evol_noli type and performs a singular value decomposition (SVD) on the transient or an incremental POD strategy;

• For parametric linear problems, a glutton algorithm is used. In this case, we define the linear system to be solved.

The operator also allows you to truncate a base (primal or dual) on a reduced domain (for example produced by the DEFI_DOMAINE_REDUIT command).

Two types of bases can be produced:

• the so-called « primal » bases: they are based on displacement fields for mechanics and on temperature fields for thermal purposes;

• the so-called « dual » bases: they are based on stress fields for mechanics and on flow fields for thermal engineering.

The operator produces a mode_empi concept.

• 1. Syntax
• 2. Operands
  • 2.1. Operand BASE
  • 2.2. Operand OPERATION
  • 2.3. Operands for strategies POD
  • 2.4. Operands for strategies GLOUTON
  • 2.5. Other transactions
• 3. Examples of use