6. D modeling#

6.1. Characteristics of modeling#

Elements MECA_HEXA20, MEFL_HEXA20, MESF_QUAD8

_images/1000000000000119000000BCE6C09ED92B029E38.png

Boundary conditions:

In all the knots on the face \(M\)

In all the nodes of the piston

6.2. Characteristics of the mesh#

Number of nodes:

201

Number of meshes and types:

24 HEXA20, 8 QUAD8

6.3. Tested values#

Frequency

( \(\mathit{Hz}\) )

Reference

Aster

Error (%)

13.8285

13.8277

-0.006

6.4. notes#

Mode calculations performed by:

CALC_MODES

OPTION =” AJUSTE “, CALC_FREQ =_F (FREQ =( 10.,20.))

The analytical solution of the first eigenvector is not known.

Contents of the results file:

Value of the first natural vibration frequency of the coupled system.