4. example#
The following example applies to the calculation of global quantities on a dynamic model of a reactor building. The following are modelled: the outer chamber, the inner chamber, the internal structures, the tank well.
The modeling of a half-building is carried out by beam elements, discrete elements representing ground connections, additional masses and connections between nodes.
It is on this beam model that the operator POST_ELEM will calculate:
the mass of the structure,
the coordinates of the center of gravity,
the inertia tensor,
the potential energy of certain modes and its distribution in the structure,
the kinetic energy of certain modes and its distribution in the structure.
4.1. Calculation of mass, center of gravity and inertia#
for the whole structure (TOUT = “OUI”)
for the group of elements containing the beams (GROUP_MA = “pou_d_t”)
for the group of elements containing the ground links (GROUP_MA = “liai_sol”)
for the group of elements containing the additional masses (GROUP_MA = “masses”)
for the group of elements containing the links between nodes (GROUP_MA = “liai_noe”)
Order
massestr = POST_ELEM (MODELE = stickmod,
CHAM_MATER = to kill, CARA_ELEM = caraelem, MASS_INER = _F (GROUP_MA =( “pou_d_t”, “liai_sol”, “masses”, “liai_noe”), TOUT = “OUI”,), TITRE =”mass, center of gravity and inertias of the structure”);
4.2. Calculating the potential energy of modes 1, 2 and 7#
for the whole structure (TOUT = “OUI”)
for the group of elements containing the beams (GROUP_MA = “pou_d_t”)
for the group of elements containing the ground links (GROUP_MA = “liai_sol”)
for the group of elements containing the additional masses (GROUP_MA = “masses”)
for the group of elements containing the links between nodes (GROUP_MA = “liai_noe”)
Order
enerpot = POST_ELEM (RESULTAT = fashion,
MODELE = stickmod,
NUME_MODE = (1,2.7,),
CHAM_MATER = to kill,
CARA_ELEM = caraelem,
ENER_POT = _F (TOUT = “OUI”,
GROUP_MA = (“pou_d_t”, “liai_sol”,
“masses”, “liai_noe”),
),
TITRE = “potential energies of modes 1, 2 and 7”,
)
4.3. Calculating the kinetic energy of modes 1, 2, and 7#
for the whole structure (TOUT = “OUI”)
for the group of elements containing the beams (GROUP_MA = “POU_D_T”)
for the group of elements containing the ground links (GROUP_MA = “LIAI_SOL”)
for the group of elements containing the additional masses (GROUP_MA = “MASSES”)
for the group of elements containing the links between nodes (GROUP_MA = “LIAI_NOE”)
Order
enercin = POST_ELEM (RESULTAT = fashion,
MODELE = stickmod,
NUME_MODE = (1,2.7,),
CHAM_MATER = to kill,
CARA_ELEM = caraelem,
ENER_CIN = _F (TOUT = “OUI”,
GROUP_MA =( “pou_d_t”, “liai_sol”,
“masses”, “liai_noe”,),
),
TITRE = “kinetic energies of modes 1, 2 and 7”,
)