Interface file of mesh IDEAS with Aster

Code_Aster

Version

7.4

Titrate:

Interface file of mesh

IDEAS

with Aster

Date:

26/05/05

Author (S):

COURTEOUS Mr.

Key

U3.03.01-F

Page

1/10

Instruction manual

U3.0- booklet: Mesh HT-66/05/004/A

Organization (S):

EDF-R & D/AMA

Instruction manual
U3.0- booklet: Mesh
Document: U3.03.01

Interface file of mesh IDEAS with Aster

Summary:

The purpose of this document is to describe the principle of the interface

IDEAS

(SDRC) with Aster.

This interface is activated in Aster by the procedure

PRE_IDEAS

[U7.01.01].

Datasets of universal file I-DEAS

read again by the interface IDEAS-Aster are the dataset 151 (title), them

datasets 15, 781 or 2411 (co-ordinates of the nodes), the datasets 71, 780 or 2412 (description of the meshs),
the datasets 752, 2417, 2429, 2430, 2431, 2432, 2435 or 2467 (groups of nodes or meshs) and the dataset
735 (nodes or meshs attached to the curves, meshs area and meshs volume).

So versions I-DEAS

currently supported are versions 4, 5 and 6 as well as versions 1.,

2., 3., 4., 5., 6., 7., 8., 9. and 10. of Master Series.

Code_Aster

Version

7.4

Titrate:

Interface file of mesh

IDEAS

with Aster

Date:

26/05/05

Author (S):

COURTEOUS Mr.

Key

U3.03.01-F

Page

2/10

Instruction manual

U3.0- booklet: Mesh HT-66/05/004/A

1 Vocabulary

IDEAS

“geometry”

together of geometrical entities on which the mesh is based. They can be
curves (

“curve”

) of surfaces (

“mesh area”

), of volumes (

'mesh

volume'

“curve”

linear geometrical entity being able to be made up of under-entities, segments, arcs of
circles, options. The meshs which are based on these under-entities are segments with 2 or 3
nodes.

“mesh area”

geometrical entity surface broadside by '

curves'

on which the meshs rest of

surface: triangles with 3 or 6 nodes or quadrangles with 4 or 8 nodes.

“mesh volume”

geometrical entity voluminal broadside by

'mesh

areas'

. Meshs of volume which

are based on these under-entities are hexahedrons with 8 or 20 nodes, pentahedrons with 6 or
15 nodes or of the tetrahedrons with 4 or 10 nodes.

“group”

an unspecified grouping (chosen by the user) of geometrical entities, nodes or of
meshs; the user gives him a name.

“universal file”

the formatted file produces by

IDEAS

constitute the data file of the interface. It contains

all the geometrical mesh (nodes and meshs), entities, groups and associations
geometrical entities - mesh.

“geometrical association entity - mesh”

list nodes or meshs being based on a given geometrical entity.

for each

“curve”

, the nodes which make it up,

for each

'mesh

area'

the nodes which make it up,

in 2D the meshs which make it up.

for each

'mesh

volume'

nodes and the meshs which make it up.

the nodes which make it up,

in 3D the meshs which make it up.

Code_Aster

Version

7.4

Titrate:

Interface file of mesh

IDEAS

with Aster

Date:

26/05/05

Author (S):

COURTEOUS Mr.

Key

U3.03.01-F

Page

3/10

Instruction manual

U3.0- booklet: Mesh HT-66/05/004/A

Interface of mesh drank

The information contained in the universal file

IDEAS

(for versions 4, 5 and 6 and poured them

1., 2., 3., 4., 5., 6., 7., 8., 9. and 10. of Master Series) are retranscribed in the file of mesh. That
relate to in particular the co-ordinates of the nodes, the meshs, the groups of nodes and meshs. It
generally acts of simple transfers of subfiles, except for the meshs where a permutation
nodes is necessary.

The names created by the interface are:

for

nodes

follow-up of the number of node

IDEAS

for

meshs

follow-up of the number of element

IDEAS

The meshs are gathered in subfiles of the homogeneous type:

SORTED

QUAD

TETRA

PENTA

HEXA

for the groups of nodes or meshs created by the user and named in

IDEAS

, it

name is simply retranscribed in capital letters:
-

8 alphanumerics to the maximum (if not truncation of the name),

the underlined white is allowed.

Note:

The name of the group cannot start with “

COUL_

“if not it is ignored by the interface

(a message of alarm informs the user of it).

IDEAS

, one can assign a color to each mesh generated (by defect, the meshs

are of green color). The colors are identified by a number (for example 7 for
green).
To keep this information in Aster, the interface

PRE_IDEAS

can generate groups

meshs of name

COUL_

n° color

IDEAS

containing all the meshs of color “n°

color

IDEAS

“. To generate these groups of meshs, the user must ask it

explicitly by CREA_GROUP_COUL = “yes” in control PRE_IDEAS.

Without explicit request of the user, these groups of meshs are not create in order to
to limit the number of groups of meshs and not to increase the size of the file unnecessarily
of mesh.

From geometrical associations entities - mesh, the interface built:

GROUP_MA

associated '

mesh volume'

in 3D or with

'mesh

area'

in 2D. They

bear the name

M_VOLUi

M_AREAi

for the geometrical entity of origin, number

GROUP_NO

associated '

mesh volume

“,”

mesh area

'or

“curve”

, which bears the names

M_VOLUi

M_AREAi

CURVEi

according to the cases.

Note:

mesh

area

and them

mesh

volume

do not exist any more in versions 1., 2., 3., 4., 5., 6.,

7., 8., 9. and 10. of Master Series. The user must thus take care to define the groups of
nodes and groups of meshs which it needs for its study.

The interface of mesh (

PRE_IDEAS

) does not retranscribe the boundary conditions and

loadings possibly present in the universal file.

Code_Aster

Version

7.4

Titrate:

Interface file of mesh

IDEAS

with Aster

Date:

26/05/05

Author (S):

COURTEOUS Mr.

Key

U3.03.01-F

Page

5/10

Instruction manual

U3.0- booklet: Mesh HT-66/05/004/A

File mesh Aster produced by the operator

PRE_IDEAS

COOR_3D

NO1

…

NO12 x12

y12

z12

FINSF

HEXA8

MA1

NO1

NO5

NO8

NO2

NO4

NO6

NO7

NO3

FINSF

PENTA6

MA2

NO5

NO9

NO6

NO8

NO11 NO7

MA3

NO6

NO9

NO10 NO7

NO11 NO12

FINSF

GROUP_NO NAME = FACE_INF

NO1

NO2

NO5

NO8

NO9

NO11

FINSF

GROUP_NO NAME = CURVE1

NO1

NO4

FINSF

…

others

GROUP_NO

for

CURVE2

with

CURVE11

GROUP_NO NAME = CURVE12

NO10 NO12

FINSF

GROUP_NO NAME = M_AREA1

NO1

NO2

NO3

NO4

FINSF

…

others

GROUP_NO

for

M_AREA2

with

M_AREA5

GROUP_NO NAME = M_AREA6

NO1

NO5

NO9

NO11 NO8

NO2

FINSF

GROUP_NO NAME = M_VOLU1

% totality of the nodes

NO1

… ……… NO12

FINSF

GROUP_MA NAME = M_VOLU1

% totality of the meshs

MA1

MA2

MA3

Code_Aster

Version

7.4

Titrate:

Interface file of mesh

IDEAS

with Aster

Date:

26/05/05

Author (S):

COURTEOUS Mr.

Key

U3.03.01-F

Page

6/10

Instruction manual

U3.0- booklet: Mesh HT-66/05/004/A

Local classification of the meshs of IDEAS and Aster

Notice preliminary:

The numbers being reproduced on the diagrams which follow are the local numbers of the nodes.

4.1

Classification of TRIANGLES (TRIA6)

CLASSIFICATION

IDEAS

CLASSIFICATION

Aster

TRIA6

4.2

Classification of QUADRANGLES (QUAD8)

Meshs of the type

QUAD9

are not available in

IDEAS

CLASSIFICATION
IDEAS

CLASSIFICATION

Aster

Code_Aster

Version

7.4

Titrate:

Interface file of mesh

IDEAS

with Aster

Date:

26/05/05

Author (S):

COURTEOUS Mr.

Key

U3.03.01-F

Page

7/10

Instruction manual

U3.0- booklet: Mesh HT-66/05/004/A

4.3

Classification of HEXAHEDRONS (HEXA8 - HEXA20)

4.3.1 HEXA8

CLASSIFICATION

IDEAS

CLASSIFICATION

Aster

4.3.2 HEXA20

5
6

CLASSIFICATION

IDEAS

CLASSIFICATION

Aster

Code_Aster

Version

7.4

Titrate:

Interface file of mesh

IDEAS

with Aster

Date:

26/05/05

Author (S):

COURTEOUS Mr.

Key

U3.03.01-F

Page

8/10

Instruction manual

U3.0- booklet: Mesh HT-66/05/004/A

4.4

Classification of PRISMS (PENTA6 - PENTA15)

4.4.1 PENTA6

CLASSIFICATION

IDEAS

CLASSIFICATION

Aster

4.4.2 PENTA15

CLASSIFICATION

Aster

CLASSIFICATION

IDEAS