Code_Aster ®
Version
6.4
Titrate:
Modelings 3D and PLAN Acoustique


Date:
24/06/03
Author (S):
O. Key NICOLAS
:
U3.33.01-D Page
: 1/4

Organization (S): EDF-R & D/AMA
Handbook of Utilization
U3.3- booklet: Finite elements acoustic
Document: U3.33.01

Modelings 3D and PLAN of the phenomenon
ACOUSTIQUE

Summary:

This document describes for modelings 3D and PLAN:

· degrees of freedom carried by the finite elements which support modeling,
· the related meshs supports,
· supported materials and loadings,
· options of calculations for the elementary matrices and the post processing,
· nonlinear possibilities as well as the options of the breaking process if they exist.

Modelings 3D and PLAN (Phénomčne: ACOUSTIQUE) correspond to finite elements acoustic in
formulation pressure (cf [R4.02.01]). Modeling 3D has voluminal meshs supports, modeling
PLAN has plane meshs supports.

Handbook of Utilization
U3.3- booklet: Finite elements acoustic
HT-66/03/002/A

Code_Aster ®
Version
6.4
Titrate:
Modelings 3D and PLAN Acoustique


Date:
24/06/03
Author (S):
O. Key NICOLAS
:
U3.33.01-D Page
: 2/4

1 Discretization

1.1
Degrees of freedom

Finished element
Degrees of freedom (with each node node)

ACOU_… (3D)
PRES: pressure
ACOU_FACE… (3D)
PRES: pressure
ACPL… (PLANE)
PRES: pressure

1.2
Net support of the matrices of rigidity

Modeling Nets Element
finished
Remarks

3D TETRA4
ACOU_TETRA4

TETRA10
ACOU_TETRA10

PENTA6
ACOU_PENTA6


PENTA15 ACOU_PENTA15


HEXA8 ACOU_HEXA8


HEXA20 ACOU_HEXA20


HEXA27 ACOU_HEXA27

PLAN TRIA3
ACPLTR3


TRIA6 ACPLTR6


QUAD4 ACPLQU4


QUAD8 ACPLQU8


QUAD9 ACPLQU9


1.3
Net support of the loadings

Modeling Nets Element
finished
Remarks

3D TRIA3
ACOU_FACE3

TRIA6
ACOU_FACE6

QUAD4
ACOU_FACE4

QUAD8
ACOU_FACE8

QUAD9
ACOU_FACE9

PLAN SEG2
ACPLSE2

SEG3
ACPLSE3

2
Significance of the symbols

·
corresponds to a functionality available

corresponds to a functionality which could exist but not
currently available
Name of
corresponds to test implementing the functionality.
case-test
////
corresponds to a functionality without significance for the element or
asking a major questioning of the code
Handbook of Utilization
U3.3- booklet: Finite elements acoustic
HT-66/03/002/A

Code_Aster ®
Version
6.4
Titrate:
Modelings 3D and PLAN Acoustique


Date:
24/06/03
Author (S):
O. Key NICOLAS
:
U3.33.01-D Page
: 3/4

3 Materials
supported

DEFI_MATERIAU
3D PLAN
Remarks


ELAS
/////
/////

ELAS_FO
/////
/////

ELAS_ORTHO
/////
/////

TRACTION
/////
/////

ECRO_LINE
/////
/////

ECRO_LINE_FO
/////
/////

CHABOCHE
/////
/////

FLUIDE
AHLV100A AHLV100F
speed of sound
complex
THER
/////
/////

THER_FO
/////
/////

THER_ORTHO
/////
/////

META_REFR
/////
/////


4 Loadings
supported

AFFE_CHAR_ACOU
3D PLAN
Remarks

PRES_IMPO
· ·
VITE_FACE
AHLV100A AHLV100F

IMPE_FACE
AHLV100A AHLV100F

LIAISON_UNIF
· ·

5 Possibilities
non-linear

None.

6
Elementary calculations of matrices

OPTIONS
3D PLAN
Remarks

“RIGI_MECA”/////
/////
“RIGI_GEOM”/////
/////
“RIGI_ROTA”/////
/////
“RIGI_MECA_HYST”/////
/////

“MASS_MECA”/////
/////
“MASS_MECA_DIAG”/////
/////

“AMOR_MECA”/////
/////
“IMPE_MECA”/////
/////
“RIGI_THER”/////
/////
“MASS_THER”/////
/////
“RIGI_ACOU”
AHLV100A AHLV100F

“MASS_ACOU”
AHLV100A AHLV100F

“AMOR_ACOU”
AHLV100A AHLV100F

MODE_FOURIER//////////

Handbook of Utilization
U3.3- booklet: Finite elements acoustic
HT-66/03/002/A

Code_Aster ®
Version
6.4
Titrate:
Modelings 3D and PLAN Acoustique


Date:
24/06/03
Author (S):
O. Key NICOLAS
:
U3.33.01-D Page
: 4/4

7
Postprocessing of calculation

7.1 Option
CALC_ELEM


3D PLAN
Remarks

“PRES_ELNO_DBEL”
AHLV100A ·

“PRES_ELNO_REEL”
AHLV100A ·

“PRES_ELNO_IMAG”
AHLV100A ·

“INTE_ELNO_ACTI”
AHLV100A ·

“INTE_ELNO_REAC”
AHLV100A ·


7.2 Option
CALC_CHAM_ELEM


3D PLAN
Remarks

“PRES_ELNO_DBEL”
AHLV100A ·

“PRES_ELNO_REEL”
AHLV100A ·

“PRES_ELNO_IMAG”
AHLV100A ·


7.3 Option
CALC_NO


3D PLAN
Remarks

“PRES_NOEU_DBEL”
· ·
“PRES_NOEU_REEL”
· ·
“PRES_NOEU_IMAG”
· ·
“INTE_NOEU_ACTI”
· ·
“INTE_NOEU_REAC”
· ·

Handbook of Utilization
U3.3- booklet: Finite elements acoustic
HT-66/03/002/A

Outline document