Code_Aster ®
Version
7.4
Titrate:
Operator ASSE_MATR_GENE


Date:
10/02/05
Author (S):
O. NICOLAS, E. BOYERE Key
:
U4.65.04-F Page
: 1/4

Organization (S): EDF-R & D/AMA

Handbook of Utilization
U4.6- booklet: Elementary matrices/Vecteurs and assembly
Document: U4.65.04

Operator ASSE_MATR_GENE

1 Goal

To assemble the matrix of rigidity or overall assets starting from the substructures.

Within the framework of a calculation using the methods of dynamic under-structuring (analyzes modal or
harmonic), this operator creates the generalized matrix of rigidity or mass or possibly
of damping (analyzes harmonic or transitory), by assembly of the matrices generalized of
macr_elem_dyna type corresponding (cf operator MACR_ELEM_DYNA [U4.65.01]) contained
in a list defined during the creation of the model generalized (cf operator DEFI_MODELE_GENE
[U4.65.02]). The assembled generalized matrix is real and symmetrical (storage of the part
triangular lower). It is built on a classification of the generalized degrees of freedom and
stored in form “line of sky”. The tables of addressing are those calculated as a preliminary by
operator NUME_DDL_GENE [U4.65.03].

The concept result produced by this operator is of type: matr_asse_gene_R.
Handbook of Utilization
U4.6- booklet: Elementary matrices/Vecteurs and assembly
HT-66/05/004/A

Code_Aster ®
Version
7.4
Titrate:
Operator ASSE_MATR_GENE


Date:
10/02/05
Author (S):
O. NICOLAS, E. BOYERE Key
:
U4.65.04-F Page
: 2/4

2 Syntax

ma_gene [matr_asse_gene_R] = ASSE_MATR_GENE





(
NUME_DDL_GENE
=
nu_gene,
[nume_ddl_gene]






OPTION =/“RIGI_GENE”,
/
“MASS_GENE”,
/
“AMOR_GENE”,





)

Handbook of Utilization
U4.6- booklet: Elementary matrices/Vecteurs and assembly
HT-66/05/004/A

Code_Aster ®
Version
7.4
Titrate:
Operator ASSE_MATR_GENE


Date:
10/02/05
Author (S):
O. NICOLAS, E. BOYERE Key
:
U4.65.04-F Page
: 3/4

3 Operands

3.1 Operand
NUME_DDL_GENE

NUME_DDL_GENE = nu_gene

Name of the concept nume_ddl_gene resulting from the operator NUME_DDL_GENE [U4.65.03] who defines
classification of the equations of the assembled generalized system, mode of storage of
coefficients of the assembled generalized matrix (line of sky) and the generalized model on which
the operations of diagonal, or full assembly are carried out.

3.2 Operand
OPTION

OPTION

The option makes it possible to determine the list of the macronutrients, contained in the concept
modele_gene resulting from DEFI_MODELE_GENE [U4.65.02], to assemble. It defines, by
consequent, the type of the generalized matrix assembled calculated by the operator
ASSE_MATR_GENE.

“RIGI_GENE”: calculation of the matrix of assembled generalized stiffness, including
terms associated with the multipliers with LAGRANGE,
“MASS_GENE”: calculation of the matrix of assembled generalized mass,
“AMOR_GENE”: calculation of the matrix of damping generalized assembled.

4 Phase
of execution

The terms corresponding to the projected matrices are assembled without processing.

On the other hand, the terms corresponding to the dualisation of the connections are the subject of a conditioning
simple. They are multiplied by a definite factor in a single way which is such as the absolute value
maximum of the terms of dualisation is equal to the maximum absolute value of the terms of rigidity
macronutrients (matrices of the projected substructures).
Handbook of Utilization
U4.6- booklet: Elementary matrices/Vecteurs and assembly
HT-66/05/004/A

Code_Aster ®
Version
7.4
Titrate:
Operator ASSE_MATR_GENE


Date:
10/02/05
Author (S):
O. NICOLAS, E. BOYERE Key
:
U4.65.04-F Page
: 4/4

Intentionally white left page.

Handbook of Utilization
U4.6- booklet: Elementary matrices/Vecteurs and assembly
HT-66/05/004/A

Outline document