Code_Aster ®
Version
7.4
Titrate:
Operator DEFI_OBSTACLE


Date:
02/02/05
Author (S):
S. LAMARCHE, Fe WAECKEL, G. JACQUART Key
:
U4.44.21-G Page
: 1/6

Organization (S): EDF-R & D/AMA, SINETICS, EDF-Pôle Industrie/CNPE of Tricastin
Handbook of Utilization
U4.4- booklet: Modeling
U4.44.21 document
Operator DEFI_OBSTACLE

1 Goal

To define the geometry of the places of shocks of a telegraphic structure. These places are defined in a plan
perpendicular with the structure modelled by beams POU_D_T and POU_D_E. It is then used by
DYNA_TRAN_MODAL [U4.53.21] for the study of the response of a structure whose displacements are
limited by the presence of this obstacle. One can also define the initial section of a structure
which one will study progressive wear. In this last case, the concept will be used by MODI_OBSTACLE
[U4.44.22].

Product a concept of the obstacle type.
Handbook of Utilization
U4.4- booklet: Modeling
HT-66/05/004/A

Code_Aster ®
Version
7.4
Titrate:
Operator DEFI_OBSTACLE


Date:
02/02/05
Author (S):
S. LAMARCHE, Fe WAECKEL, G. JACQUART Key
:
U4.44.21-G Page
: 2/6

2 Syntax

obstacle = DEFI_OBSTACLE



(
/
TYPE
=
/
“CERCLE”,
[DEFAUT]
/
“PLAN_Y”,
/
“PLAN_Z”,
/
“BI_CERCLE”,
/
“BI_CERC_INT”,
/
“BI_PLAN_Y”,
/
“BI_PLAN_Z”,
/
“DISCRET”,
/

“CRAYON_900”,
/

“CRAYON_1300”,
/

“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_CARSP_900”,
/

“GUID_B_CARSP_900”,
/

“GUID_C_CARSP_900”,
/

“GUID_D_CARSP_900”,
/

“GUID_E_CARSP_900”,
/

“GUID_F_CARSP_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_CARSP_1300”,
/

“GUID_B_CARSP_1300”,
/

“GUID_C_CARSP_1300”,
/

“GUID_D_CARSP_1300”,
/

“GUID_E_CARSP_1300”,
/

“GUID_F_CARSP_1300”,





VALE =
thetar, [l_R]




VERIF = “FIRM”,



);
Handbook of Utilization
U4.4- booklet: Modeling
HT-66/05/004/A

Code_Aster ®
Version
7.4
Titrate:
Operator DEFI_OBSTACLE


Date:
02/02/05
Author (S):
S. LAMARCHE, Fe WAECKEL, G. JACQUART Key
:
U4.44.21-G Page
: 3/6

3 Operands

3.1 Operand
TYPE

/
TYPE = typ

Operand TYPE makes it possible to give:

·
the form wraps play in the connection of shock by a text among the following:
PLAN_Y, PLAN_Z, CERCLE, DISCRET, BI_PLAN_Y, BI_PLAN_Z, BI_CERCLE and
BI_CERC_INT;
·
the initial section of structures such as pencils CRAYON_ * and them guides
GUID_ * _ * _ * of control rods of the REP 900 and 1300 MW.

The obstacles of the type PLAN_Y, PLAN_Z, CERCLE and DISCRET define the geometry of
places of shock enters a mobile structure and an indeformable obstacle. They are traced
below [Figure 3.1-a] according to the selected type.

Zloc
Zloc
Zloc
play
play
Yloc
Yloc
Yloc
play
PLAN_Y
PLAN_Z
CERCLE

Appear 3.1-a

The value of the play and the local reference mark (Xloc, Yloc, Zloc) will be defined in the moment of the use
obstacle (see operator DYNA_TRAN_MODAL [U4.53.21]). The origin of this reference mark being it
place of the telegraphic structure considered.

In the case of the obstacle TYPE = “DISCRET”, it is necessary to specify the curve defining it
contour and play simultaneously, using key word VALE.
Handbook of Utilization
U4.4- booklet: Modeling
HT-66/05/004/A

Code_Aster ®
Version
7.4
Titrate:
Operator DEFI_OBSTACLE


Date:
02/02/05
Author (S):
S. LAMARCHE, Fe WAECKEL, G. JACQUART Key
:
U4.44.21-G Page
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Types BI_PLAN_Y, BI_PLAN_Z, BI_CERCLE and BI_CERC_INT make it possible to define them
possible places of contact of the telegraphic structure between two nodes NO1 and pertaining NO2
each one with a mobile structure. Geometries of the connections of plane contact on plan (or
ring on circle) are described on the figure [Figure 3.1-b] below.

Zloc
Zloc
N01
N01
N02
D1
D1
D2
Yloc
play
Yloc
D2
N02
play
BI_PLAN_Y
BI_PLAN_Z
N02
Zloc
play
R2
NO2
R1
N01
R2
Zloc
R1
NO1
Yloc
Yloc
BI_CERCLE
BI_CERC_INT

Appear 3.1-b

The value thicknesses of matter surrounding the nodes of shock (D1 and D2 for one
obstacle of the type BI_PLAN_ *, R1 and R2 for an obstacle of the type BI_CERCLE or
BI_CERC_INT) as well as the local reference mark (Xloc, Yloc, Zloc) are defined in the moment of
the use of the obstacle, i.e. in operator DYNA_TRAN_MODAL [U4.53.21].

Several initial forms, in particular for the study of the vibrations of the bunches of
order, are defined. They correspond with the pencil of the various bunches of
order and from their guidance.
Handbook of Utilization
U4.4- booklet: Modeling
HT-66/05/004/A

Code_Aster ®
Version
7.4
Titrate:
Operator DEFI_OBSTACLE


Date:
02/02/05
Author (S):
S. LAMARCHE, Fe WAECKEL, G. JACQUART Key
:
U4.44.21-G Page
: 5/6

Operand TYPE then makes it possible to define the geometry of a pencil of control rod
nine of type REP 900MW: `CRAYON_900' or of type REP1300MW: “CRAYON_1300”;
and that of the various parts of a guidance of bunch nine: type starting with GUID
(GUID_ * _ * _ *). The three indications which follow GUID respectively make it possible to define:

·
the type of pencil of bunch - of A with F - which is inside (the channel of guidance is
different for each type of pencil);
·
the part of the guidance to which the obstacle belongs: CARTE if discontinuous guidance;
GCONT if continuous guidance; GCOMB if guidance combustible; CARSP if card with play
increased;
·
and the type of engine: 900 if REP 900MW or 1300 if REP 1300MW.

3.2 Operands
VALE/VERIF

VALE = thetar

In the case of obstacle DISCRET it is necessary to specify the curve defining contour and the play
at the same time, using key word VALE.

thetar is the list of realities making it possible to describe the contour of the obstacle of the type DISCRET in
polar co-ordinates. One describes the obstacle like a curve planes into polar while giving
couples of values, the first being the angle in degrees of 0 with 360°, the second the radius
[Figure 3.2-a].

VALE
= (0.0, 0.00086,

30.0,
0.00086,

90.0,
0.001,
150.0,
0.001,
210.0,
0.001,
270.0,
0.001,
330.0,
0.001,
360.0,
0.00086,)


Appear 3.2-a

VERIF = “FIRM”

Key word allowing to check if the curve given into polar is well closed.

4 Phase
of execution

It is checked that the number of values behind VALE is even and that the curve defined in co-ordinates
polar is well closed (operand VERIF = “FERME”).
Handbook of Utilization
U4.4- booklet: Modeling
HT-66/05/004/A

Code_Aster ®
Version
7.4
Titrate:
Operator DEFI_OBSTACLE


Date:
02/02/05
Author (S):
S. LAMARCHE, Fe WAECKEL, G. JACQUART Key
:
U4.44.21-G Page
: 6/6

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Handbook of Utilization
U4.4- booklet: Modeling
HT-66/05/004/A

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