3. Item Content JEVEUX#

The dimensions and the presence of the objects depend on:

nbmode

number of modes in the modal base (length of. NUMO)

nbvite

number of discretization points of the fluid speed interval (length of. VITE)

typeflu

flow configuration type (FAISCEAU_TRANS, FAISCEAU_AXIAL,…)

coupling

taking into account fluid-structure coupling (OUI/NON)

3.1. Purpose. REMF#

'. REMF ': S V K8 long=2

V (1)

name of the type concept sd_type_flui_struused for the calculation

V (2)

name of the modal base (type sd_mode_meca) used for the calculation

3.2. Purpose. NUMO#

'. NUMO ': S V I long=nbmode

V (imode)

imodesemorder number of the modal base that participates in the calculation

3.3. Purpose. VITE#

'. VITE ': S V I long=nbvite

V (*)

discretization of the fluid speed

3.4. Purpose. DESC#

'. DESC ': S V K16 long=1

V (1)

“DEPL”

Note:

this item is useless.

3.5. Purpose. FACT#

'. FACT ': S V R

If FAISCEAU_TRANS: ⇒ long=3*nbvite*nbmode

(Vimode, ipoint,1)

Pseudo participation factor in the Ox direction for the ipointth speed and for the imodesth mode

(V imode, ipoint, 2)

Pseudo participation factor in the Oy direction for the ipointth speed and for the imodesth mode

(V imode, ipoint, 3)

Pseudo participation factor in the Oz direction for the ipointth speed and for the imodesth mode

Otherwise: ⇒ long=3*nbmode

(Vimode, 1)

Pseudo participation factor in the Ox management for the imodesemode

(bimode, 2)

Pseudo participation factor in the Oy direction for the imodesemode

(Vimode, 3)

Pseudo participation factor in the Oz direction for the imodesemode

3.6. Purpose. FREQ#

'. FREQ ': S V R long=2*nbmode*nbpoint

V (imode, ipoint,1)

frequency of the imodesemode disturbed by the flow for the ipointth fluid speed

V (imode, ipoint,2)

damping of the imodesemode disturbed by the flow for the ipointth fluid speed

Note:

Damping becomes negative at the rate of fluid-elastic instability.

3.7. Purpose. MASG#

'. MASG ': S V R

If FAISCEAU_TRANS * ⇒ long=nbvite*nbmode**

(Vimode, didot)

Generalized mass of the imodesemode for the ipointemspeed of the fluid

Otherwise: ⇒ long=nbmode

V (imode)

Generalized mass of imodesemode

3.8. Items. VCN and. VEN#

'. VCN ': S V R long=nbmode*nbconnors

'. VEN ': S V R long=nbmode

nbconnorscorresponds to the number of discretization points for the value of the Connors constant accumulated for all zones.

The objects. VCNet. VENn only exist if:

FAISCEAU_TRANS + coupling = OUI + BASE_MODALE/AMOR_REDUI_CONN

V (imode, iconnors)

value of the critical speed calculated for the imodesemode and for the iconorsum value of the Connors constant.

V (imode)

value of the effective speed of imodesemode

3.9. sd_table data structure#

An sd_table type concept containing a single NOM_CHAM parameter. It contains the names of all the sd_cham_nodes modal movements disturbed by the flow.

3.10. sd_l_table data structure#

This data structure only exists in the case of a FAISCEAU_AXIAL configuration.

This sd_l_table contains a single sd_table under the name MATR_GENE.

This sd_table has the following parameters:

  • NUME_VITE list of integers describing the list of fluid speed numbers,

  • VITE_FLUI describing the value of the fluid speed,

  • MATR_MASS for the various generalized mass matrices (one per fluid speed),

  • MATR_AMOR for the various generalized damping matrices (one per fluid speed)

  • MATR_RIGI for the various generalized stiffness matrices (one per fluid speed)

We also store a NUME_DDL_GENEcommun for all these matrices. This NUME_DDL_GENEa shape (K8). NUXXXoù the XXXest determined by GNOMSD. The name of the concept is therefore based on the user name of the concept sd_melasflumbut is also stored in the concept of generalized matrices.

The same remark also applies to the fields stored in the table. They have a PROF_CHNO in common.