18. P modeling#

18.1. Characteristics of modeling#

Elements MECA_HEXA20, MEFL_HEXA20, MEFL_PYRAM13, MESF_QUAD8

We resume the O modeling mesh by going from linear to quadratic and by creating a layer of fluid elements PYRAM13.

Boundary conditions:

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

In all the nodes of the piston

Number of nodes:	273
Number of meshes and types:	16 HEXA20, 48 PYRAM13, 8 QUAD8

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.