background image
Code_Aster
®
Version
7.4
Titrate:
Operator MODI_OBSTACLE
Date:
02/02/05
Author (S):
S. LAMARCHE,
D. BOSSELUT, G. DEVESA
Key
:
U4.44.22-C
Page
:
1/6
Instruction manual
U4.4- booklet: Modeling
HT-66/05/004/A
Organization (S):
EDF-R & D/AMA















Instruction manual
U4.4- booklet: Modeling
U4.44.22 document



Operator
MODI_OBSTACLE


1 Goal
To calculate the obstacles in the systems guidance-tube, after wear.
The concept result of MODI_OBSTACLE is of obstacle type. It is expressed in co-ordinates
polar, it is of the same type as that of DEFI_OBSTACLE with “DISCRETE” keyword and sound
use is the same one. This form called figure of play is usable in the operator
DYNA_TRAN_MODAL under the key word OBSTACLE.
This calculation can intervene following a calculation of dynamics with DYNA_TRAN_MODAL. One calculates
initially the volumes used with operator POST_USURE. TABL_USURE resulting from
POST_USURE contains the volumes used during dynamic calculation. MODI_OBSTACLE uses
TABL_USURE to calculate the new figure of play after wear.
The use of the empirically given laws specific starting from the experience feedback on
control rods currently limits the use of this option to the specific case of it
component.
Product a concept result of the obstacle type.
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Code_Aster
®
Version
7.4
Titrate:
Operator MODI_OBSTACLE
Date:
02/02/05
Author (S):
S. LAMARCHE,
D. BOSSELUT, G. DEVESA
Key
:
U4.44.22-C
Page
:
2/6
Instruction manual
U4.4- booklet: Modeling
HT-66/05/004/A
2 Syntax

figure1 = MODI_OBSTACLE
[obstacle]
(
GUIDE
=
guid,
[obstacle]
/
PENCIL
=
pencil, [obstacle]
/
R_MOBILE
=
rcray,
[R]
OBSTACLE
=
figure0,
[obstacle]
/
BORING
=
bore,
[R]
/
V_USUR_OBST =
vusob,
[l_R]
V_USUR_TUBE
= vustu,
[l_R]
/
TABL_USURE
=
tabuse, [tabl_post_usur]
INST
=
inst,
[R]
INFORMATION
=
/1,
[DEFECT]
/2,
);
background image
Code_Aster
®
Version
7.4
Titrate:
Operator MODI_OBSTACLE
Date:
02/02/05
Author (S):
S. LAMARCHE,
D. BOSSELUT, G. DEVESA
Key
:
U4.44.22-C
Page
:
3/6
Instruction manual
U4.4- booklet: Modeling
HT-66/05/004/A
3 Operands
3.1 Operand
GUIDE
The obligatory keyword GUIDE makes it possible to define guidance used. This guidance was defined in
DEFI_OBSTACLE.
It is of “DISCRETE” type or “GUID_ * _ * _ *” if option TABL_USURE is not used.
It is obligatorily of type “GUID_ * _ * _ *” if one uses option TABL_USURE (the removal of
preset forms of wear is valid only starting from the new antagonists).
“GUID_ * _ * _ *” contains the type of card, the type of bearing, the radii and the thicknesses of
guidance. By defect, it provides also the pencil adapted to the guide.
“GUID_ * _ * _ *” can take the values indicated exhaustively in the list below.
“GUID_A_CARTE_900”
“GUID_A_GCONT_900”
“GUID_A_GCOMB_900”
“GUID_B_CARTE_900”
“GUID_B_GCONT_900”
“GUID_B_GCOMB_900”
“GUID_C_CARTE_900”
“GUID_C_GCONT_900”
“GUID_C_GCOMB_900”
“GUID_D_CARTE_900”
“GUID_D_GCONT_900”
“GUID_D_GCOMB_900”
“GUID_E_CARTE_900”
“GUID_E_GCONT_900”
“GUID_E_GCOMB_900”
“GUID_F_CARTE_900”
“GUID_F_GCONT_900”
“GUID_F_GCOMB_900”

“GUID_A_CARTE_1300”
“GUID_A_GCONT_1300”
“GUID_A_GCOMB_1300”
“GUID_B_CARTE_1300”
“GUID_B_GCONT_1300”
“GUID_B_GCOMB_1300”
“GUID_C_CARTE_1300”
“GUID_C_GCONT_1300”
“GUID_C_GCOMB_1300”
“GUID_D_CARTE_1300”
“GUID_D_GCONT_1300”
`GUID_D_GCOMB_1300
“GUID_E_CARTE_1300”
“GUID_E_GCONT_1300”
“GUID_E_GCOMB_1300”
“GUID_F_CARTE_1300”
“GUID_F_GCONT_1300”
“GUID_F_GCOMB_1300”
“GUID_A_CAR11_1300”
“GUID_B_CAR11_1300”
“GUID_C_CAR11_1300”
“GUID_D_CAR11_1300”
“GUID_E_CAR11_1300”
“GUID_F_CAR11_1300”

3.2 Operand
PENCIL/R_MOBILE
Useless operand when one uses a guide “GUID_ * _ * _ *”, the definition of the pencil (900 or 1300MW)
then is already informed by defect.
The keywords “PENCIL” or “R_MOBILE” are thus optional (of type PRESENT-ABSENT). They
allow to define the mobile structure of which it is necessary to hold account in the definition of the figure of play.
For pencil, the type results from DEFI_OBSTACLE.
It is of “DISCRETE” type or “CRAYON_900” or “CRAYON_1300” if the option is not used
TABL_USURE.
It is obligatorily of type “CRAYON_900” or “CRAYON_1300” if option TABL_USURE is used
because the removal of the preset forms of wear is valid only starting from the new antagonists.
For rcray, indicate the radius of the pencil in meter.
background image
Code_Aster
®
Version
7.4
Titrate:
Operator MODI_OBSTACLE
Date:
02/02/05
Author (S):
S. LAMARCHE,
D. BOSSELUT, G. DEVESA
Key
:
U4.44.22-C
Page
:
4/6
Instruction manual
U4.4- booklet: Modeling
HT-66/05/004/A
3.3 Operand
OBSTACLE
The optional keyword OBSTACLE makes it possible to introduce the initial figure of play figure0 from
which one calculates the obstacle figure1 result.
If figure1 = MODI_OBSTACLE (reuse = figure1, the obstacle figure0 is modified at exit of
MODI_OBSTACLE.

3.4 Operand
BORING
The optional keyword BORING applies to the tube. It makes it possible to give the ratio thickness used on
initial thickness which sets off an alarm. The release of alarm corresponds to one
boring of the tube.

3.5 Operands
V_USUR_OBST and V_USUR_TUBE
Keywords V_USUR_OBST and V_USUR_TUBE make it possible the user to give volumes
used to apply respectively to the obstacle and the tube. vusob and vustu are lists of volumes
used by angular sector. They have the same structure as the lists of worn volumes resulting from
POST_USURE.
These key words are used only to carry out calculations of test using MODI_OBSTACLE. At the time
use of MODI_OBSTACLE following a dynamic calculation, one more often uses
TABL_USURE.

3.6 Operands
TABL_USURE and INST
tabuse is a table of wear defined by POST_USURE. It contains the volumes used on the guide and
on the pencil by angular sectors and for various dates.
MODI_OBSTACLE reads the volumes used at the moment inst and applies these volumes to the guide and to
pencil according to precise profiles'. These profiles result from the experience feedback.
These rules are valid only starting from new obstacles. I.e. the guide and the pencil
used must be defined by “GUID_ * _ * _ *” (and “CRAYON_ *”) in DEFI_OBSTACLE.
In the case of the use of option INST of TABL_USURE several times of continuation, it is necessary to take care of
to control well the dates and cumulated moments preserved in table TABL_USURE.
background image
Code_Aster
®
Version
7.4
Titrate:
Operator MODI_OBSTACLE
Date:
02/02/05
Author (S):
S. LAMARCHE,
D. BOSSELUT, G. DEVESA
Key
:
U4.44.22-C
Page
:
5/6
Instruction manual
U4.4- booklet: Modeling
HT-66/05/004/A
4 Example
of use
An example of use is the vibratory calculation of a bunch in a guide of bunch.
The step indicated is then followed [Figure 4-a].














































Appear 4-a: Example of calculation using MODI_OBSTACLE
Not boring
Calculation of the worn obstacles
from
V'
obst
and V'
tube
and of the initial geometries.
DEFI_OBSTACLE
“GUID_A_CARTE_900”
Initialization of calculation, one enters the geometry of
problem
DYNA_TRAN_MODAL
The first dynamic calculation,
on the initial geometry
POST_USURE
Calculation of the volumes used starting from dynamic calculation:
V
obst
and V
tube
.
(depend on the date, written by angular sector.)
MODI_OBSTACLE
Calculation of the worn obstacles
starting from V
obst
and V
tube
and of the initial geometries
Boring
Not boring
DYNA_TRAN_MODAL
POST_USURE
MODI_OBSTACLE
the 2nd dynamic calculation,
on the worn geometry
Calculation of worn volumes
V'
obst
and V'
tube
.
Calculation of the obstacles
used
from
V'
obst
and V'
tube
and of the geometries
initial
Boring
MODI_OBSTACLE
DYNA_TRAN_MODAL
POST_USURE
MODI_OBSTACLE
Not boring
Boring
Calculation of the worn obstacles
2
ème
dynamic calculation,
on worn guide and pencil
nine
Calculation of worn volumes:
V'
obst
and V'
tube
.
POST_USURE
Tube_neuf
The pencil is changed
bored. V
tube
is given to
zero.
background image
Code_Aster
®
Version
7.4
Titrate:
Operator MODI_OBSTACLE
Date:
02/02/05
Author (S):
S. LAMARCHE,
D. BOSSELUT, G. DEVESA
Key
:
U4.44.22-C
Page
:
6/6
Instruction manual
U4.4- booklet: Modeling
HT-66/05/004/A


























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