Code_Aster ®
Version
7.4
Titrate:
Operator POST_DYNA_ALEA


Date:
08/02/05
Author (S):
S. CAMBIER, J. PIGAT, A. DUMOND Key
:
U4.84.04-F Page
: 1/6

Organization (S): EDF-R & D/AMA, EDF-Division Combustible, EDF-GDF/DIT-BEX

Handbook of Utilization
U4.8- booklet: Postprocessing and dedicated analyzes
Document: U4.84.04

Operator POST_DYNA_ALEA

1 Goal

Post-to treat results of the interspectre type statistically and to print them.

POST_DYNA_ALEA allows on functions selected in a concept of the type [tabl_intsp]:

·
to calculate statistical parameters: spectral moments, standard deviation, distribution of
peaks, center frequency,
·
to calculate the function of probability of not exceeding of VANMARCKE used in
analyze seismic.

The tables of interspectres are obtained by various operators: LIRE_INTE_SPEC [U4.36.01],
CALC_INTE_SPEC [U4.36.03], DEFI_INTE_SPEC [U4.36.02], DYNA_ALEA_MODAL [U4.53.22],
DYNA_SPEC_MODAL [U4.53.23] or REST_SPEC_PHYS [U4.63.22].

One will refer to [R7.10.01] for the description of the processing carried out.

This operator produces a printable table of the tabl_post_alea type by IMPR_TABLE [U4.91.03].
Handbook of Utilization
U4.8- booklet: Postprocessing and dedicated analyzes
HT-66/05/004/A

Code_Aster ®
Version
7.4
Titrate:
Operator POST_DYNA_ALEA


Date:
08/02/05
Author (S):
S. CAMBIER, J. PIGAT, A. DUMOND Key
:
U4.84.04-F Page
: 2/6

2 Syntax

[tabl_post_alea] = POST_DYNA_ALEA

(



INTE_SPEC
=
inter [tabl_intsp]


NUME_VITE_FLUI
=
nume
[I]


TOUT_ORDRE




=
“OUI”
[DEFAUT]


/
NUME_ORDRE_I
=
lnumi [l_Kn]





NUME_ORDRE_J
=
lnumj [l_Kn]



/NOEUD_I = lnoeudi





[l_Kn]




NOEUD_J = lnoeudj





[l_Kn]





NOM_CMP_I



=
lcmpi [l_Kn]





NOM_CMP_J



=
lcmpj [l_Kn]



/OPTION = “DIAG”


DEPASSEMENT
=_F (









/VALE_MIN= valmin
[R]











VALE_MAX= valmax
[R]










PAS =

not [R]










DUREE
=

/
1.
[DEFAUT]





/
duration
[R]








)


RAYLEIGH
=_F (








/VALE_MIN = valmin
[R]










VALE_MAX = valmax
[R]









PAS
=

not



[R]







)


GAUSS =_F (







/VALE_MIN = valmin

[R]









VALE_MAX = valmax

[R]








PAS
=

not




[R]






)


VANMARCKE
=_F (








/VALE_MIN =
valmin
[R]










VALE_MAX =
valmax
[R]









PAS
=

not



[R]









DUREE =

/10. [DEFAUT]













/
duration
[R]







)


MOMENT
=
lmom [l_I]


INFO
=
/
1
[DEFAUT]





/
2


TITER
= title
[l_Kn]

);
Handbook of Utilization
U4.8- booklet: Postprocessing and dedicated analyzes
HT-66/05/004/A

Code_Aster ®
Version
7.4
Titrate:
Operator POST_DYNA_ALEA


Date:
08/02/05
Author (S):
S. CAMBIER, J. PIGAT, A. DUMOND Key
:
U4.84.04-F Page
: 3/6

3 Operand

3.1 Word
key
INTE_SPEC

INTE_SPEC = inter

inter is the name user of the table of interspectres.


NUME_VITE_FLUI = nume

nume is the sequence number when the table of interspectres contains several matrices
interspectrales (case of calculations of coupling fluid-structure parameterized by a speed of
incidental fluid).


TOUT_ORDRE = “YES”

All the tables are taken into account.

One defines then the terms of () the matrix (S) whose functions will undergo the processing.


/NUME_ORDRE_I = lnumi




NUME_ORDRE_J = lnumj

When the autospectres or the interspectres are calculated on the modes:

lnumi is the list of the sequence numbers of the modes “I”. Example: (2,3,1).

lnumj is the list of the numbers of odre modes “I. Example: (2,1,4)

The indices are appairés according to the same row.

(2,2) corresponds to the autospectre on mode 2,

(3,1) corresponds to the interspectre between mode 3 and mode 1.

lnumi and lnumj must contain the same number of terms.



/
NOEUD_I = lnoeudi
NOEUD_J = lnoeudj
NOM_CMP_I = lcmpi
NOM_CMP_J = lcmpj

When the autospectres or the interspectres are calculated on the nodes in one
direction given:

lnoeudi is the list of the nodes according to “I”: (NO92, NO95, NO98)

lnoeudj is the list of the nodes according to “J”: (NO92, NO92, NO92)

lcmpi is the list of the components according to “I”: (DX, DX, DY)

lcmpj is the list of the components according to “J”: (DX, DX, DX)

The nodes and components are appairés according to the same row:

(NO92 DX, NO92 DX) corresponds to the autospectre with node NO92 in direction DX,

(NO98 DY, NO92 DX) corresponds to the interspectre between node NO92 in the direction
DX and node NO95 in the direction DY.

lnoeudi, lnoeudj, lcmpi and lcpmj must contain the same number of terms.

/OPTION = “DIAG”

Calculations are carried out on the whole of the autospectres matrix and only for
these.
Handbook of Utilization
U4.8- booklet: Postprocessing and dedicated analyzes
HT-66/05/004/A

Code_Aster ®
Version
7.4
Titrate:
Operator POST_DYNA_ALEA


Date:
08/02/05
Author (S):
S. CAMBIER, J. PIGAT, A. DUMOND Key
:
U4.84.04-F Page
: 4/6

3.2 Word
key
DEPASSEMENT

DEPASSEMENT
=

Key word factor indicating that the selected processing will consist in seeking the average number of
goings beyond of a threshold given for a given length of time.



/
VALE_MIN = valmin



VALE_MAX = valmax

[valmin
;
valmax]

is the field on which the threshold varies. By defect this interval is:

[0. ; 6.x]

where X is the standard deviation of the treated answer.




PAS = not

not is the step of discretization for the expression of the result.
valmax
- valmin
By defect: not =

200.





DUREE = duration

duration is the duration of the phenomenon and is worth 1. second by defect.

3.3 Word
key
RAYLEIGH


RAYLEIGH =

Key word factor indicating that the selected processing will consist in seeking the density of
probability of the positive peaks according to a law of RAYLEIGH. This law is adapted to the signals to
narrow tape.

The key words under this key word factor have the same direction as for DEPASSEMENT.

3.4 Word
key
GAUSS

GAUSS
=

Key word factor indicating that the selected processing will consist in seeking the density of
probability of the positive peaks according to a normal law. This law is adapted to the signals with tape
broad.

The key words under this key word factor have the same direction as for DEPASSEMENT.

3.5 Word
key
VANMARCKE

VANMARCKE
=

Key word factor indicating that the selected processing will consist in calculating a probability of not
going beyond of threshold according to the law of VANMARCKE (analyzes seismic stochastic).

Key words VALE_MIN, VALE_MAX and PAS have the same direction as for DEPASSEMENT.



DUREE = duration

duration is the duration of the phenomenon. It is worth 10 seconds per defect (lasted average
commonly allowed of the strong phase of a seism).

In this case, the operator also provides the factors of peaks P and Q of the signal.
Handbook of Utilization
U4.8- booklet: Postprocessing and dedicated analyzes
HT-66/05/004/A

Code_Aster ®
Version
7.4
Titrate:
Operator POST_DYNA_ALEA


Date:
08/02/05
Author (S):
S. CAMBIER, J. PIGAT, A. DUMOND Key
:
U4.84.04-F Page
: 5/6

3.6 Operand
MOMENT

MOMENTS = lmom

lmom is the list of the commands of the spectral moments which will be calculated. By defect, moments
spectral of commands 0, 1, 2, 3 and 4 are always calculated. It is thus advisable to mention in
this list moments of a nature higher than 4. Example: (5,7,8).

3.7 Operand
INFO

INFO
=

1
impression of the results requested.
2
like 1 with in more the statistical functions calculated for the selected interspectre.

3.8 Operand
TITER

TITER = title

title is the title of calculation. It will be printed at the head results. See [U4.03.01].

4 Results
provided

For each function chosen in the interspectre, POST_DYNA_ALEA stores in an accessible table
by IMPR_TABLE [U4.91.03]

·
spectral moments,
·
statistical parameters:
- standard deviation,
- factor
of irregularity,
-
average extrema numbers a second,
-
a number of passages by zero a second,
- frequency
power station,
·
other results requested.

If INFO = 1 one prints in file MESSAGE

·
the name user of the table,
·
the two indices (2 nodes or 2 modes) of the selected function,
·
the type of calculated result,
·
options of calculations selected or taken by defect,
·
values of the selected functions.

5
Phase of checking

In addition to the checks of the supervisor is carried out in a preliminary way:

the comparison length of the lists (indices, node, component), nume_ordre or
the existence of key word OPTION.
Handbook of Utilization
U4.8- booklet: Postprocessing and dedicated analyzes
HT-66/05/004/A

Code_Aster ®
Version
7.4
Titrate:
Operator POST_DYNA_ALEA


Date:
08/02/05
Author (S):
S. CAMBIER, J. PIGAT, A. DUMOND Key
:
U4.84.04-F Page
: 6/6

6 Example

First example:

POSTALEA =POST_DYNA_ALEA (
INTE_SPEC= INTERS,
TOUT_ORDRE=' OUI',
OPTION=' DIAG'
)

Second example:

POSTALEA=POST_DYNA_ALEA (INTE_SPEC=INTERS,
NOEUD_I=' N1',
NOM_CMP_I=' DX',
NOEUD_J=' N1',
NOM_CMP_J=' DX',
GAUSS=_F ()
)

Handbook of Utilization
U4.8- booklet: Postprocessing and dedicated analyzes
HT-66/05/004/A

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