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Code_Aster
®
Version
6.4
Titrate:
Modelings
3D
and
PLAN
Accoustics
Date:
24/06/03
Author (S):
O. NICOLAS
Key
:
U3.33.01-D
Page
:
1/4
Instruction manual
U3.3- booklet: Finite elements acoustic
HT-66/03/002/A
Organization (S):
EDF-R & D/AMA















Instruction manual
U3.3- booklet: Finite elements acoustic
Document: U3.33.01



Modelings
3D
and
PLAN
phenomenon
ACCOUSTICS



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
(Phenomenon:
ACCOUSTICS
) correspond to finite elements acoustic in
formulation pressure (cf [R4.02.01]). Modeling
3D
has voluminal meshs supports, modeling
PLAN
has plane meshs supports.
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Code_Aster
®
Version
6.4
Titrate:
Modelings
3D
and
PLAN
Accoustics
Date:
24/06/03
Author (S):
O. NICOLAS
Key
:
U3.33.01-D
Page
:
2/4
Instruction manual
U3.3- booklet: Finite elements acoustic
HT-66/03/002/A
1 Discretization
1.1
Degrees of freedom
Finished element
Degrees of freedom (with each node node)
ACOU_… (3D)
NEAR
: pressure
ACOU_FACE… (3D)
NEAR
: pressure
ACPL… (PLANE)
NEAR
: 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
case-test
corresponds to test implementing the functionality.
////
corresponds to a functionality without significance for the element or
asking a major questioning of the code
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Code_Aster
®
Version
6.4
Titrate:
Modelings
3D
and
PLAN
Accoustics
Date:
24/06/03
Author (S):
O. NICOLAS
Key
:
U3.33.01-D
Page
:
3/4
Instruction manual
U3.3- booklet: Finite elements acoustic
HT-66/03/002/A
3 Materials
supported
DEFI_MATERIAU
3D PLAN
Remarks
ELAS
/////
/////
ELAS_FO
/////
/////
ELAS_ORTHO
/////
/////
TRACTION
/////
/////
ECRO_LINE
/////
/////
ECRO_LINE_FO
/////
/////
CHABOCHE
/////
/////
FLUID
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//////////
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Code_Aster
®
Version
6.4
Titrate:
Modelings
3D
and
PLAN
Accoustics
Date:
24/06/03
Author (S):
O. NICOLAS
Key
:
U3.33.01-D
Page
:
4/4
Instruction manual
U3.3- booklet: Finite elements acoustic
HT-66/03/002/A
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”
· ·