HyperWorks Solvers

/IMPL/DYNA/FSI

/IMPL/DYNA/FSI

Previous topic Next topic No expanding text in this topic  

/IMPL/DYNA/FSI

Previous topic Next topic JavaScript is required for expanding text JavaScript is required for the print function  

Engine Keyword

/IMPL/DYNA/FSI - Implicit Dynamics Fluid Structure Interaction Parameters

Description

Defines the settings for Fluid Structure Interaction Analysis with AcuSolve.

Format

/IMPL/DYNA/FSI

ESET   SSET   PORT   MINEX   MAXEX   TAG   DATA   MSG   WAIT   INIT

FTOL   DTOL   TTOL   FXTOL

Data

Description

ESET

/GRSHEL/SHEL/, /GRSH3N/SH3N/ or /GRBEAM/BEAM/ ID of the damp surface elements. These can be shell or beam elements. For solid element surfaces, coat the damp surface with SHEL or SH3N elements with material defined by /MAT/LAW0.

Note: Both ESET and SSET can be used to define the damp surface. ESET must be used if the damp surface contains beam elements.

Integer > 0, or 0 for no ESET

SSET

/SURF/ surf_ID of the damp surface.

Note: Both ESET and SSET can be used to define the damp surface. ESET must be used if the damp surface is beam elements.

Integer > 0, or 0 for no SSET

PORT

Port number for communication with AcuSolve. Must be the same as the EXTERNAL_CODE socket_port setting in the AcuSolve input data.

Default = 10000 (Integer > 0, or 0 for default)

MINEX

Minimum number of exchanges between RADIOSS and AcuSolve per time step. This should be the same as AUTO_SOLUTION_STRATEGY min_stagger_iterations in the AcuSolve input data.

Default = 1 (Integer > 0, or 0 for default)

MAXEX

Maximum number of exchanges between RADIOSS and AcuSolve per time step. This should be the same as AUTO_SOLUTION_STRATEGY max_stagger_iterations in the AcuSolve input data.

Default = 10 (Integer > 0, or 0 for default)

TAG

If USETAG is 0, then all the damp surfaces will be tagged as “0”.

If USETAG is 1, then all the damp surfaces will be tagged with the PART ID. Each PART ID must match the TAG ID specified by the external_code_tags parameter of the EXTERNAL_CODE_SURFACE command in the AcuSolve input data.

Default = 0 (Integer = 0 or 1, or 0 for default)

DATA

Determines the data to be exchanged between RADIOSS and AcuSolve.

= 1: Exchange forces and displacements

= 2: Exchange forces/moments and displacements/rotations

= 3: Exchange temperatures and heat-fluxes

= 4: Exchange forces/temperatures and displacements/heat-fluxes

= 5: Exchange forces/moments/temperatures and displacements/rotations/heat-fluxes

Default = 1 (Integer = 1 or 2, or 0 for default) (3, 4 and 5 for future use)

MSG

= 0: no messages printed

= 1: basic messages printed

= 2: more messages printed

= 3: every communication is printed

Default = 0  (3 > Integer ≥ 0)

WAIT

Defines the wait time, in seconds, for AcuSolve to be started after RADIOSS is started.

Default = 3600  (Integer > 0, or 0 for default)

INIT

Initial AcuSolve time increment to start the coupling with RADIOSS.

Default = 0 (Integer > 0)

FTOL

Tolerance for exchange convergence of Forces

Default = 0.005  (Real > 0.0, or 0 for default)

DTOL

Tolerance for exchange convergence of Displacements

Default = 0.0001 (Real > 0.0, or 0 for default)

TTOL

Tolerance for exchange convergence of Temperatures (For future use) (see Comment 5)

Default = 0.005  (Real > 0.0, or 0 for default)

FXTOL

Tolerance for exchange convergence of Heat-Fluxes (For future use) (see Comment 5)

Default = 0.0001  (Real > 0.0, or 0 for default)

Comments

1.Only a single /IMPL/DYNA/FSI data can be in the Engine file.
2.Beam elements cannot be combined with 2D or solid surface damp surfaces.
3.The first line of data is required to specify either ESET or SSET.
4.The second line of data with the convergence tolerances is optional.
5.TTOL and FXTOL are not used at this time.

See Also:

Implicit Finite Element Analysis