17. O modeling#

17.1. Characteristics of modeling#

Elements MECA_HEXA8, MEFL_HEXA8, MEFL_PYRAM5, MEFS_QUAD4

The mesh from modeling A is repeated by replacing a layer of fluid elements HEXA8 by a layer of fluid elements PYRAM5.

Boundary conditions:

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

In all the piston nodes

Number of nodes:	71
Number of meshes and types:	16 HEXA8, 48 PYRAM5, 8 QUAD4

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.