6. Implemented in Code_Aster

The projection base consists either of dynamic modes calculated by the command CALC_MODES [U4.52.02] stored in a mode_meca concept, or of dynamic modes and static modes calculated by the command DEFI_BASE_MODALE [U4.64.02] stored in a modal_base concept.

The generalized coordinate calculation phase is processed by the PROJ_MESU_MODAL [U4.73.01] command. The data is grouped under 4 key words: factors.

The data relating to the numerical model (projection base) are grouped under the keyword factor MODELE_CALCUL. It specifies the numerical model and the projection base.

Measurement data is grouped under the keyword factor MODELE_MESURE. In particular, it specifies the model associated with the structure and the measurement read by the LIRE_RESU command.

The possible manual spatial association of the nodes is given under the keyword factor CORR_MANU.

Data concerning the resolution of the opposite problem is grouped under the keyword factor RESOLUTION. It specifies the decomposition method used (LU, SVD) and the taking into account of the regularization term.

The results can then be returned to a physical base using the command REST_GENE_PHYS [U4.63.31].