3. Modeling A: 3D case#
3.1. Characteristics of modeling#
Piston: |
PHENOMENE: “MECANIQUE” |
MODELISATION: “3D” |
Fluid: |
PHENOMENE: “MECANIQUE” |
MODELISATION: “3D_ FLUIDE” |
3.2. Characteristics of the mesh#
Number of knots: 54
Number of meshes and types: 20 HEXA8
40 QUA4 (faces of HEXA8)
3.3. Tested values#
The pressure values at nodes 16, 18 and 47 are tested (see mesh). For node 16, the two maxima (compression and depression) and the return to rest are tested. For nodes 18 and 47, the maximum compression is tested.
DYNA_VIBRA:
Node |
Moment ( \(s\) ) |
Calculation with Code_Aster (Pressure in \(\mathit{Pa}\) ) |
\(\mathit{N16}\) |
4.71250D—01 |
7.13737D+03 |
7.27500D—01 |
—7.08305D+03 |
|
1.27375D+00 |
0.182 |
|
\(\mathit{N18}\) |
4.71250D—01 |
7.13737D+03 |
\(\mathit{N47}\) |
3.72500E—01 |
7.09321E+03 |
Energy |
Moment ( \(s\) ) |
Calculation with Code_Aster (Energy in \(J\) ) |
TRAV_EXT |
6.0D—01 |
1.61742D+04 |
ENER_CIN |
6.0D—01 |
8.70823D+03 |
ENER_TOT |
6.0D—01 |
1.6432D+03 |
TRAV_AMOR |
6.0D—01 |
0.0D+00 |
TRAV_LIAI |
6.0D—01 |
5.82278D+03 |
DISS_SCH |
6.0D—01 |
3.38028D-04 |
TRAV_EXT |
1.2D+00 |
2.59604D+04 |
ENER_CIN |
1.2D+00 |
2.18903D+00 |
ENER_TOT |
1.2D+00 |
1.35116D-01 |
TRAV_AMOR |
1.2D+00 |
0.0D+00 |
TRAV_LIAI |
1.2D+00 |
2.59581D+04 |
DISS_SCH |
1.2D+00 |
-2.72389D-04 |
DYNA_NON_LINE:
Node |
Instant ( \(s\) ) |
Calculation with Code_Aster (Pressure in \(\mathrm{Pa}\) ) |
\(\mathit{N16}\) |
4.71000E—01 |
7.11473E+03 |
7.26000E—01 |
—7.00022E+03 |
|
1.20000E+00 |
37.5 |
|
\(\mathit{N18}\) |
4.71000E—01 |
7.11473E+03 |
\(\mathit{N47}\) |
3.72000E—01 |
7.08110E+03 |
Energy |
Moment ( \(s\) ) |
Calculation with Code_Aster (Energy in \(J\) ) |
|
TRAV_EXT |
6.0D—01 |
1.61,825 D+04 |
|
ENER_CIN |
6.0D—01 |
8.54463 D+03 |
|
ENER_TOT |
6.0D—01 |
1.6 5942 D+03 |
|
TRAV_AMOR |
6.0D—01 |
0.0D+00 |
|
TRAV_LIAI |
6.0D—01 |
|
|
DISS_SCH |
6.0D—01 |
3.3 2745 D-01 |
3.3 2745 D-0 |
TRAV_EXT |
1.2D+00 |
2.5 8781 D+04 |
|
ENER_CIN |
1.2D+00 |
4.05194 D -01 |
|
ENER_TOT |
1.2D+00 |
3.14213 D-02 |
3.14213 D-02 |
TRAV_AMOR |
1.2D+00 |
0.0D+00 |
|
TRAV_LIAI |
1.2D+00 |
2.5 8775 D+04 |
|
DISS_SCH |
1.2D+00 |
|
1.47130 D-0.1 |