4. Example calculations with CALC_MATR_ELEM

4.1. Geometric rigidity matrix for Euler buckling

rigigeom = CALC_MATR_ELEM (OPTION =' RIGI_GEOM ', MODELE = mo,

CARA_ELEM = carac, SIEF_ELGA = chsig)

4.2. « Mass » matrix in acoustics

Massacou = CALC_MATR_ELEM (OPTION =' MASS_ACOU ', MODELE = mo,

CHAM_MATER (= chmat)

4.3. Mechanical stiffness matrix

rigiblock = CALC_MATR_ELEM (OPTION =' RIGI_MECA ', CHARGE = ch_block)