3. Calculation process#

This operator chains the following operations:

  • definition of the generalized model (DEFI_MODELE_GENE),

  • numbering the degrees of freedom of the generalized model (NUME_DDL_GENE),

  • assembly of generalized matrices (ASSE_MATR_GENE),

It is limited to the creation of real generalized matrices.

For its implementation, the user can draw inspiration from the « e » and « f » models of the sdls106 test case. These models correspond respectively to the « b » and « d » models of the same test case.

3.1. Keyword RESU_ASSE_SSD#

This keyword factor defines exit concepts.

3.1.1. Operand MODELE#

♦ MODELE = model

model: generalized model that contains the elements that make up the overall structure (assembled substructures).

3.1.2. Operand NUME_DDL_GENE#

◊ NUME_DDL_GENE = Nugene

nugene: numbering the degrees of freedom of the global structure.

3.1.3. Operand RIGI_GENE#

◊ RIGI_GENE = rigene

rigene: generalized stiffness matrix of the overall structure.

3.1.4. Operand MASS_GENE#

◊ MASS_GENE = magene

magene: generalized mass matrix of the global structure.

3.2. Keyword SOUS_STRUC#

Each occurrence of this factor keyword defines the characteristics of a substructure.

The description of the operands associated with this keyword is the same as the description of the SOUS_STRUC keyword for the DEFI_MODELE_GENE [U4.65.02] operator.

Note:

By default, the substructure is considered to be neither translated nor rotated: TRANS = (0., 0., 0.) and ANGL_NAUT = (0., 0., 0.) and = (0., 0., 0.).

3.3. Keyword LIAISON#

Each occurrence of this factor keyword defines the link between two substructures. The description of the operands associated with this keyword is the same as the description of the LIAISON keyword for the DEFI_MODELE_GENE [U4.65.02] operator.

Among the operands of this keyword, operand OPTION allows you to choose the type of mode (static modes or interface modes) that you add in addition to the normal modes.

   ◊ OPTION

/'CLASSIQUE': each ddl in the interface corresponds to a static link mode

/'REDUIT': use of interface modes (previously calculated with CREA_ELEM_SSD for example)

3.4. Keyword VERIF#

This keyword makes it possible to check the consistency of the generalized model. The description of the operands associated with this keyword is the same as the description of the VERIF keyword for the DEFI_MODELE_GENE [U4.65.02] operator.

3.5. Operand METHODE#

This operand allows you to choose how to number the degrees of freedom of the generalized model. Two choices are possible.

   ◊ METHODE

/'CLASSIQUE': constructs a numbering of the generalized degrees of freedom allowing the taking into account of the equations of links between substructures by the method of double Lagrange multipliers.

/'ELIMINE': constructs a numbering of the generalized degrees of freedom allowing the consideration of link equations by the method of eliminating constraints on the variables.

3.6. Operand STOCKAGE#

This operand makes it possible to choose the storage mode of the assembled matrices.

   ◊ STOCKAGE

/'LIGN_CIEL': sky line storage mode

/'PLEIN': we store all the elements in the upper triangular part of the matrix.

3.7. Operand INFO#

This operand makes it possible to print more or less information on the generalized model created in the file “MESSAGE”.