Modal settings updated
============================

A mode_meca concept can contain, for each mode, the following modal parameters (visible for example by printing the concept with the IMPR_RESU command at FORMAT =' RESULTAT 'with the option TOUT_PARA =' OUI' with the option =' '):


.. csv-table::

    "Parameter title in Code_Aster", "Definition"
    "FREQ ", "Natural frequency (damped, if applicable)"
    "AMOR_GENE ", "Generalized modal amortization"
    "AMOR_REDUIT ", "Reduced modal damping"
    "FACT_PARTICI_D *(* = Xou You Z)", "Fashion participation factor in the direction D*"
    "MASS_EFFE_D *(* = Xou You Z)", "Effective modal mass in the direction D*"
    "MASS_EFFE_UN_D *(* = Xou You Z)", "Unit effective modal mass in the direction D*"
    "MASS_GENE ", "Generalized mass of fashion"
    "OMEGA2 ", "Own pulse (damped, if applicable) squared"
    "RIGI_GENE ", "Generalized stiffness of the mode"


Table 5.1: list of modal parameters.

These parameters are defined mathematically in the reference documentation [:ref:`R5.01.03 <R5.01.03>`].

The operator NORM_MODE calculates or updates the following modal parameters, which depend on the normalization chosen: FACT_PARTICI_D *, MASS_GENE, and RIGI_GENE. It also enriches the data structure with MASS_EFFE_UN_D* parameters (independent of normalization).

The other parameters are independent of normalization.