4. Modeling B: 2D case#

4.1. Characteristics of modeling#

Piston:

PHENOMENE: “MECANIQUE”

MODELISATION: “D_ PLAN”

Fluid:

PHENOMENE: “MECANIQUE”

MODELISATION: “2D_ FLUIDE”

4.2. Characteristics of the mesh#

_images/1000000000000418000001F20E683932B367A11A.png

Number of knots: 35

Number of meshes and types:

24 QUA4

18 SEG2 (faces of QUA4)

4.3. Tested values#

The pressure values at nodes 7 and 10 are tested (see mesh). For node 10, we test the two maxima (compression and depression) and the return to rest. For node 7, we test the maximum compression.

  • DYNA_VIBRA

Node

Instant ( \(s\) )

Calculation with Code_Aster (Pressure in \(\mathrm{Pa}\) )

\(\mathit{N10}\)

3.86000E—01

4.88962E+03

6.37000E—01

—4.93961E+03

1.15600E+00

0.434

\(\mathit{N7}\)

3.86000E—01

4.89074E+03

  • DYNA_NON_LINE:

Node

Instant ( \(s\) )

Calculation with Code_Aster (Pressure in \(\mathrm{Pa}\) )

\(\mathit{N10}\)

3.84000E—01

4.87451E+03

6.44000E—01

—4.88583E+03

1.09400E+00

3.1

\(\mathit{N7}\)

3.84000E—01

4.88877E+03