/FXINP

Engine Keyword Generates input files for flexible bodies from eigenmodes and static modes computation.

Format

/FXINP

EIGID₁ CDAMP₁ ITYP₁

…

EIGID_N CDAMP_N ITYP_N

Definitions

Data	Description	SI Unit Example
`EIGID`₁ … `EIGID`_N	Identification number of eigenmodes and static modes computation problem defined in Radioss Starter (/EIG). The corresponding flexible body will have the same support as that defined in the /EIG. Local reduction modes for this flexible body will be those requested in the /EIG. If static modes are requested, they will be orthogonalized with respect to mass matrix.
`CDAMP`₁ … `CDAMP`_N	Critical structural damping coefficient. It is used to compute Rayleigh damping coefficients to be used on the flexible body from the lowest and the highest local eigen frequencies. (Real)
`ITYP`₁ … `ITYP`_N	Computed flexible body type. A flexible body is either fully free or fully blocked. See Flexible Body Input File for details about IBLO variable. = 0 Flexible body variable IBLO is set automatically by Radioss from the kernel of the stiffness matrix. = 1 Flexible body variable IBLO is forced to 0 (the flexible body is free of blockage and its finite overall rotations and translations are computed). = 2 Flexible body variable IBLO is forced to 1 (the flexible has no rigid body modes).

Data

Description

SI Unit Example

EIGID₁ … EIGID_N

Identification number of eigenmodes and static modes computation problem defined in Radioss Starter (/EIG).

The corresponding flexible body will have the same support as that defined in the /EIG. Local reduction modes for this flexible body will be those requested in the /EIG. If static modes are requested, they will be orthogonalized with respect to mass matrix.

CDAMP₁ … CDAMP_N

Critical structural damping coefficient.

It is used to compute Rayleigh damping coefficients to be used on the flexible body from the lowest and the highest local eigen frequencies.

(Real)

ITYP₁ … ITYP_N

Computed flexible body type. A flexible body is either fully free or fully blocked. See Flexible Body Input File for details about IBLO variable.

= 0: Flexible body variable IBLO is set automatically by Radioss from the kernel of the stiffness matrix.
= 1: Flexible body variable IBLO is forced to 0 (the flexible body is free of blockage and its finite overall rotations and translations are computed).
= 2: Flexible body variable IBLO is forced to 1 (the flexible has no rigid body modes).