3. Operands

♦ BASE = fashion

[mode_meca] concept that defines modal characteristics before fluid-elastic coupling is taken into account. Depending on the user’s choice, the operator changes this input concept or creates a new concept of type [mode_meca].

♦ BASE_ELAS_FLUI = short

[melasflu] concept that defines the new characteristics of the modes taken into account for fluid-elastic coupling, for different flow velocities.

♦ NUME_VITE_FLUI = numv

Allows you to highlight the characteristics of the modes taken into account for fluidelastic coupling, for a given flow speed.

◊ NUME_ORDRE = l_nuor

If we modify the concept of input type [mode_meca]: list of the order numbers of the undisturbed modes to which we want to assign reduced damping.

If a new concept such as [mode_meca] is created at the output: list of the order numbers of the undisturbed modes that are effectively retained to reconstruct the modal base. The possibility of assigning reduced depreciation to these modes is maintained, using the AMOR_REDUIT or AMOR_UNIF operands below.

Note:

By default, we select all the modes that were not taken into account for fluid-elastic coupling. Do not give serial numbers corresponding to coupled modes in this list.

The constitution of the [mode_meca] result depending on the choices for the operands NUME_ORDRE, AMOR_REDUIT and AMOR_UNIF * ** * ** * is specified in paragraph [§ :ref:`1 <RefNumPara__36632021>`] . *

◊/AMOR_REDUIT = l_amor

List of reduced depreciations assigned to undisturbed modes.

/AMOR_UNIF = love

Reduced damping assigned identically to undisturbed modes.

◊ INFO = 1 or 2

Inactive operand. To get the results printed, use the IMPR_RESU [U4.91.01] command.

◊ TITRE = title

Text argument [TXM] defining the title attached to the [mode_meca] concept at the output.