3. Operands#
3.1. Operand MODELE#
♦ MODELE = mo
Allows you to define the name of the model to which the load will be assigned. Depending on the dimension of the problem, it must be a 2D model of plane deformations (”D_ PLAN “), or in 3D a solid model with a “3D” modeling.
3.2. Operand CHARGEMENT#
◊ CHARGEMENT =/”ONDE_PLANE”,
/”FORCE”,
Indicates the nature of the imposed load:
CHARGEMENT = “ONDE_PLANE”: loading in the form of a vertical propagation plane wave imposed on the model and deduced from the plane wave motion imposed on a 2D ground column or on another auxiliary model. The wave is shear if there is a horizontal solicitation movement, it is of pressure if there is a vertical solicitation movement.
CHARGEMENT = “FORCE”: loading in the form of opposing forces imposed on the lateral edges of the model.
3.3. Operand UNITE_TRAN_INIT#
Provides the unit for writing in the “TABLEAU” format of the transitional evolutions in each of the levels of a 2D column of laminate flooring obtained during a call prior to DEFI_SOL_EQUI. During this previous call, evolutions are created using the UNITE_RESU_TRAN keyword. The loads imposed on the model are extracted in the form of force sheets dependent on time and the stratification dimension from the file corresponding to this unit.
3.3.1. Operand NOM_CMP#
◊ NOM_CMP =/”DX”, [DEFAUT]
/”DY”,
Indicates the direction of the signal imposed on the 2D ground column that was used to provide the results of the transient evolutions to be imposed as boundary conditions:
NOM_CMP = “DX”: the imposed signal is horizontal (corresponds to a vertical propagation shear wave);
NOM_CMP = “DY”: the imposed signal is vertical (corresponds to a vertical pressure wave).
3.3.2. Operand AXE#
◊ AXE =/”X”,
/”Y”, /”Z”,
Indicates the direction of the load placed on the model. This parameter is necessary in 3D and allows, by its presence, to activate this load case.
Note: this keyword is not necessary in 2D because the direction of the load depends on the type of load and the direction of the signal: for NOM_CMP = “DX”, we have “X” for CHARGEMENT = “ONDE_PLANE” and “Y” for CHARGEMENT = “FORCE”. Conversely for NOM_CMP = “DY”.
3.3.3. Operand NOM_PARA#
◊ NOM_PARA =/”Y”,
/”Z”, [DEFAUT]
Allows you to specify in 3D only, the direction of propagation of the plane wave signal generating the force to be applied and corresponding to the vertical direction of the model. This operand is not necessary in most cases because it is generally deduced from the direction of the signal imposed on the ground column by NOM_CMP and from the direction of the load imposed on the model by AXE. But for NOM_CMP = “DY”, and AXE = “X”, for example, we can have a propagation parameter for a loading of the “FORCE” type both in the “Y” direction and in the “Z” direction. And for NOM_CMP = “DX”, and AXE = “X”, for a loading of the “ONDE_PLANE” type, we can have both an SH wave in the “Y” direction and an SV wave in the “Z” direction.
However, we consider a value by default “Z” as the vertical direction for a 3D problem.
3.3.4. Operands GROUP_MA_DROITE/GROUP_MA_GAUCHE#
♦ | ◊ GROUP_MY_RIGHT = gmda
Allow you to define respectively the names of the groups of cells representative of the right edge and the left edge of the model to which the load will be assigned. At least one of these operands must be filled in. These mesh groups are linear in 2D and surface in 3D, except in the case of loading type “FORCE” in 3D where line groups of cells encircling the edges of the model must be defined.
3.3.5. Operand TABLE_MATER_ELAS#
Indicates the table that contains information on the geometric description of laminate flooring layers and that of the initial characteristics of the materials that make up these layers, layer by layer. It corresponds to the table produced by the call to DEFI_SOL_EQUIqui also produced the file entered by UNITE_TRAN_INIT.
3.3.6. Z0 operand#
Indicates, the dimension of the free surface, zero by default, of the model to which to correspond geometrically the zero dimension of the 2D floor column model.
3.3.7. Operand LONG_CARA#
Indicates, in the case of plane wave loading, the value of the characteristic length defined in DEFI_MATERIAU keyword ELASpermettant to calculate the stiffness added on the absorbent border consisting of the right and left edges of the ground column.
3.4. Operand RESU_INIT#
Provides the name of the result of the transient evolution calculated on an auxiliary model from which to extract the fields of speed, displacement or nodal force necessary to generate the second-member evolutions to be applied as boundary conditions at the edges of the model.
3.4.1. Operand COEF#
◊ COEF =/1.0, [DEFAUT]
/Coef
Give the combination factor to be applied in the case of a load of type “FORCE”. It may be necessary to apply factors -1 in the case of a pressure wave P or in the case of a shear wave S on the nodal force fields calculated on the auxiliary model of the original result entered behind the keyword RESU_INIT.
3.4.2. Operands MATR_AMOR/MATR_RIGI#
♦ MATR_AMOR = matr_a
◊ MATR_RIGI = matr_k,
In the case of a load of type 'ONDE_PLANE', names of the assembled damping and stiffness matrices (optional) that are used in :math:`KU+CV` products constituting the second-member evolution produced from which we can create the load to be applied to the model.
3.4.3. Operands NUME_DDL/MATR_RIGI#
◊/MATR_RIGI = matr_k
/NUME_DDL = number,
In the case of a load of type 'FORCE', entries from which we can obtain the reference numbering or conversion of the second-member evolution produced from which we can create the load to be applied to the model.
3.4.4. Operands INST/LIST_INST/PRECISION/CRITERE#
◊ INST = litps
List of real values of times for calculating the original result.
◊ LIST_INST = litps
List of real numbers produced by DEFI_LIST_REEL [U4.34.01] of moments of calculation of the evolutions produced.
◊ PRECISION =/prec [R]
/1.0D-6 [DEFAUT]
Precision used to find the time specified in the original result.
◊ CRITERE =/'RELATIF',
/”ABSOLU,”
Criteria used to find the time specified in the original result.
3.4.5. Operand NOM_CHAM_INIT#
♦ NOM_CHAM_INIT =/'ACCE',
/”FORC_NODA”, /”REAC_NODA”,
Name of the field of the result of the calculated initial evolution of the type evol_char or dyna_transwhich is then converted into the field of the result of the evolution second member of the evol_char type transformed into a load.
3.4.6. Operand DDL_EXCLUS#
◊ DDL_EXCLUS = cmp_name [TXM]
Name of component to be excluded from the result field of the calculated initial evolution of the type evol_char or dyna_trans which is then converted into the field of the result of the evolution second member of the evol_char type transformed into a load. Generally applies to a field “FORC_NODA”. The whole field is taken if the keyword is not filled in.
3.5. Operand TITRE#
◊ TITRE = title
Allows the user to set a title for the load.
3.6. Operand INFO#
◊ INFO =
Indicate a print level for information in the « MESSAGE « file:
INFO = 1: no printing
INFO = 2: Print load information.