5. 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 =” “):

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 [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.