Code_Aster
®
Version
7.4
Titrate:
Operator
MACR_ELEM_DYNA
Date:
10/02/05
Author (S):
O. NICOLAS, E. BOYERE
Key
:
U4.65.01-F
Page
:
1/4
Instruction manual
U4.6- booklet: Elementary matrices/Vectors and assembly
HT-66/05/004/A
Organization (S):
EDF-R & D/AMA
Instruction manual
U4.6- booklet: Elementary matrices/Vectors and assembly
Document: U4.65.01
Operator
MACR_ELEM_DYNA
1 Goal
To define a dynamic macronutrient of under-structuring.
Within the framework of a transitory analysis, modal or harmonic, with dynamic under-structuring
operator MACR_ELEM_DYNA carries out the projection of the matrices of rigidity, mass and
possibly of damping (analyzes harmonic) on the basis of modal definite substructure
by DEFI_BASE_MODALE [U4.64.02], and the extraction of the matrices of connection of the interfaces. The result
is consisted of the projected matrices and matrices of connection. It can be used several times with
different orientations in the same model (cf DEFI_MODELE_GENE [U4.65.02]). It can be
printed on file by control IMPR_MACR_ELEM [U7.04.33].
Product a concept of the macr_elem_dyna type.
Code_Aster
®
Version
7.4
Titrate:
Operator
MACR_ELEM_DYNA
Date:
10/02/05
Author (S):
O. NICOLAS, E. BOYERE
Key
:
U4.65.01-F
Page
:
3/4
Instruction manual
U4.6- booklet: Elementary matrices/Vectors and assembly
HT-66/05/004/A
3 Operands
3.1 Operand
BASE_MODALE
BASE_MODALE = bamo
Name of the concept
base_modale
product by the operator
DEFI_BASE_MODALE
[U4.64.02].
3.2 Operand
MATR_RIGI
MATR_RIGI = Mr.
Name of the concept stamps assembled of type
matr_asse_DEPL_R
product by the operator
ASSE_MATRICE
[U4.61.22] or the macro-control
MACRO_MATR_ASSE
[U4.61.21]
corresponding to the matrix of rigidity of the substructure.
3.3 Operand
MATR_MASS
MATR_MASS = mm
Name of the concept stamps assembled of type
matr_asse_DEPL_R
product by the operator
ASSE_MATRICE
[U4.61.22] or the macro-control
MACRO_MATR_ASSE
[U4.61.21]
corresponding to the matrix of mass.
These two operands are to be employed if the option is used
“RITZ”
.
3.4 Operand
MATR_AMOR
/
AMOR_REDUIT
/
MATR_AMOR = my
Name of the concept stamps assembled of type
matr_asse_DEPL_R
product by the operator
ASSE_MATRICE
[U4.61.22] or the macro-control
MACRO_MATR_ASSE
[U4.61.21]
corresponding to the matrix of damping viscous, specific to the macronutrient. This
damping must be of RAYLEIGH type by element (combination linear of rigidity and
mass on the level of the element) and is thus defined by the properties of material
(operator:
DEFI_MATERIAU
[U4.43.01], operands
AMOR_ALPHA
and
AMOR_BETA
).
/AMOR_REDUIT =
List reduced depreciation (percentage of damping criticizes) agent with
each mode of vibration of the macronutrient. The length of the list is (with more) equal to
a number of clean modes of the modal base; if it is lower, one supplements the list with
reduced depreciation equal to the last term of the list entered by the user. None
damping is not associated the static modes. The matrix of damping generalized
macronutrient
K
is thus diagonal incomplete (
J
index of the clean mode):
C
K
J
=
0
0
0
3.5 Operand
OPTION
OPTION =
Option of calculation of the projection of the matrix of rigidity on the basis of modal substructure:
“CONVENTIONAL”
:
The property of orthogonality of the normal modes and the static modes compared to the matrix
of rigidity is taken into account in the programming and the extra-diagonal terms are not
calculated.
Code_Aster
®
Version
7.4
Titrate:
Operator
MACR_ELEM_DYNA
Date:
10/02/05
Author (S):
O. NICOLAS, E. BOYERE
Key
:
U4.65.01-F
Page
:
4/4
Instruction manual
U4.6- booklet: Elementary matrices/Vectors and assembly
HT-66/05/004/A
“RITZ”
:
The base of projection is supposed to thus be able to be unspecified one does not make any assumption on
the structure of the projected matrices.
“DIAG_MASS”:
The modal base created by
DEFI_BASE_MODALE
allows to have a matrix of projected mass
diagonal necessary to couple this calculation with EUROPLEXUS.
3.6 Operand
TITRATE
TITRATE = title
Titrate concept created.
3.7 Operand
INFORMATION
INFORMATION =
Level of the information provided in the file '
MESSAGE
':
1
no impression,
2
writing of the general information (concepts upstream, basic standard),
4 Example
An example of use of this operator is given in the documentation of the operator
DEFI_SQUELETTE
[U4.24.01].