Code_Aster ®
Version
8.2
Titrate:
Operator DEFI_BASE_MODALE
Date:
31/01/06
Author (S):
O. NICOLAS, E. BOYERE Key
:
U4.64.02-H1 Page:
1/6
Organization (S): EDF-R & D/AMA
Handbook of Utilization
U4.6- booklet: Elementary matrices/Vecteurs and assembly
Document: U4.64.02
Operator DEFI_BASE_MODALE
1 Goal
To define the base of a dynamic under-structuring or a modal recombination.
The modal base obtained by this operator is of the type: “CLASSIQUE” if the modal base is
composed of dynamic clean modes and the static deformations calculated by the operator with
to start from a concept of the interf_dyna_clas type produces by DEFI_INTERF_DYNA [U4.64.01].
Option DIAG_MASS makes it possible to recompute a classification for the static modes of such kind
that the matrix of mass is diagonal. the base is RITZ in the other cases.
Product a concept of the base_modale type.
Handbook of Utilization
U4.6- booklet: Elementary matrices/Vecteurs and assembly
HT-62/06/004/A
Code_Aster ®
Version
8.2
Titrate:
Operator DEFI_BASE_MODALE
Date:
31/01/06
Author (S):
O. NICOLAS, E. BOYERE Key
:
U4.64.02-H1 Page:
2/6
2 Syntax
bamo [base_modale] = DEFI_BASE_MODALE (
/CLASSIQUE = _F (
INTERF_DYNA=
intdyn, [interf_dyna_clas]
MODE_MECA = modes,
[mode_meca]
NMAX_MODE =/nbmode,
[I]
/
10,
[DEFAUT]
),
/
RITZ =
_F ( |
MODE_MECA = modes,
[l_mode_meca]
|
MODE_STAT = modesta,
[mode_stat_ *]
|
MULT_ELAS = multelas,
[mult_elas]
| BASE_MODALE=
bamo,
[base_modale]
NMAX_MODE =/nbmode,
[I]
/
999,
[DEFAUT]
)
/
DIAG_MASS = _F ( |
MODE_MECA = modes,
[l_mode_meca]
|
MODE_STAT = modesta,
[mode_stat_ *]
),
/
ORTHO_BASE = _F (BASE = modes,
[l_mode_meca, base_modale]
MATRICE = matrix,
[matr_asse_ *]
),
INTERF_DYNA
=
intdyn, [interf_dyna_clas]
NUME_REF
=
numddl, [nume_ddl]
TITER
=
titrate,
[l_Kn]
INFO
=
/
1,
[DEFAUT]
/
2,
)
Handbook of Utilization
U4.6- booklet: Elementary matrices/Vecteurs and assembly
HT-62/06/004/A
Code_Aster ®
Version
8.2
Titrate:
Operator DEFI_BASE_MODALE
Date:
31/01/06
Author (S):
O. NICOLAS, E. BOYERE Key
:
U4.64.02-H1 Page:
3/6
3 Operands
3.1 Word
key
CLASSIQUE
/CLASSIQUE
Key word factor for the definition of a modal base of type “CLASSIQUE”.
3.1.1 Operand
INTERF_DYNA
INTERF_DYNA = intdyn
Name of the concept of the interf_dyna_clas type produces by DEFI_INTERF_DYNA [U4.64.01].
The operator calculates the static deformations corresponding to the various defined interfaces,
while being based on the classification used for the calculation of the clean modes.
3.1.2 Operands
MODE_MECA/NMAX_MODE
MODE_MECA = modes
Name of the concept of the mode_meca type containing the clean modes of the structure.
NMAX_MODE = nbmode
A number of modes suitable to use in the modal base. Clean modes corresponding
with the nbmode the lowest frequencies are taken into account.
3.2 Word
key
RITZ
/RITZ
Key word factor allowing to build a modal base of substructure of the type “RITZ”.
They is made up starting from 2 occurrences of key word RITZ.
3.2.1 Word
key
MODE_MECA
1ère occurrence of key word RITZ. Name of the concept of the mode_meca type containing the clean modes
dynamic of the treated substructure. One can give a list of mode_meca obtained each one by
restitution of a mode_gene on a different substructure.
3.2.2 Word
key
MODE_STAT
2nd occurrence of key word RITZ. Name of the concept of the mode_stat_ type * produced by the operator
MODE_STATIQUE [U4.52.14] which contains the static modes calculated with the interface of
substructure.
3.2.3 Word
key
MULT_ELAS
Name of the concept of the mult_elas type produces by the operator MACRO_ELAS_MULT [U4.51.02] who
contains the static modes given by this operator.
Handbook of Utilization
U4.6- booklet: Elementary matrices/Vecteurs and assembly
HT-62/06/004/A
Code_Aster ®
Version
8.2
Titrate:
Operator DEFI_BASE_MODALE
Date:
31/01/06
Author (S):
O. NICOLAS, E. BOYERE Key
:
U4.64.02-H1 Page:
4/6
3.2.4 Word
key
BASE_MODALE
Name of concept of the base_modale type produces by a preceding call of the operator of
DEFI_BASE_MODALE [U4.64.02]. It can have entered only at the time of the first occurrence of the key word
RITZ. The second occurrence of key word RITZ will then contain obligatorily the key word
MODE_STAT. The name of concept base_modale result of the operator can be different from this one
or identical (it is then réentrant).
3.2.5 NMAX_MODE
A number of modes to be retained in the dynamic modes (or statics) given by one of the key words
precedents under the occurrence of key word RITZ.
3.2.6 Operand
INTERF_DYNA
Interface dynamic substructure (to be informed possibly and only if one uses
“RITZ”).
3.2.7 Operand
NUME_REF
Classification of reference on which all fields of displacement (dynamic modes and
statics) constituting the base of “RITZ” will be reordered.
3.3 Word
key
DIAG_MASS
/DIAG_MASS
Key word allowing to recompute the static modes by eliminating the dynamic contribution
and while proceeding to a orthogonalization of Graam-Schmidt.
3.3.1 Word
key
MODE_MECA
Name of the concept of the mode_meca type containing the dynamic clean modes of the substructure
treated.
3.3.2 Word
key
MODE_STAT
Name of the concept of the mode_stat_ type * produced by the operator MODE_STATIQUE [U4.52.14] who
contains the static modes.
3.4 Word
key
ORTHO_BASE
/ORTHO_BASE
Key word allowing of réorthonormaliser the modes of a base while proceeding to one
orthogonalization of Graam-Schmidt.
3.4.1 Word
key
BASE
Name of the concept of the mode_meca type or bases modal containing dynamic clean modes.
3.4.2 Word
key
MATRICE
Name of the concept of the matr_asse_ type * which contains will be taken into account for the scalar products
at the time of the reorthogonalisation.
3.5 Operand
TITER
TITER = title
Titrate concept created.
Handbook of Utilization
U4.6- booklet: Elementary matrices/Vecteurs and assembly
HT-62/06/004/A
Code_Aster ®
Version
8.2
Titrate:
Operator DEFI_BASE_MODALE
Date:
31/01/06
Author (S):
O. NICOLAS, E. BOYERE Key
:
U4.64.02-H1 Page:
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3.6 Operand
INFO
INFO =
Level of the information provided in file “MESSAGE”:
1
no impression,
2
writing of the general information (concepts upstream, basic standard),
4 Example
An example of use of the command is given in the documentation of the operator
DEFI_SQUELETTE [U4.24.01].
Handbook of Utilization
U4.6- booklet: Elementary matrices/Vecteurs and assembly
HT-62/06/004/A
Code_Aster ®
Version
8.2
Titrate:
Operator DEFI_BASE_MODALE
Date:
31/01/06
Author (S):
O. NICOLAS, E. BOYERE Key
:
U4.64.02-H1 Page:
6/6
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Handbook of Utilization
U4.6- booklet: Elementary matrices/Vecteurs and assembly
HT-62/06/004/A
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