FSI
Bulk Data Entry Defines the settings for Fluid-Structure Interaction Analysis with AcuSolve.
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
FSI | FSID | SURFID/ELSET | PORT | FCNVTOL | DCNVTOL | TCNVTOL | FXCNVTOL | ||
MINEX | MAXEX | USETAG | FSIDATA | WAITTIME |
Definitions
Field | Contents | SI Unit Example |
---|---|---|
FSID | Fluid-Structure Interaction identification number. | |
SURFID | ID of the damp surface
defined by the SURF Bulk
Data Entry. Alternatively, the surface can be defined by an element set (via ELSET field) if the surface contains only shell, bar, or beam elements. No default (Integer > 0) |
|
ELSET | Element SET
ID of the damp surface elements. These can be
shell, bar or beam elements. The SURFID field should be used if the damp surface is the surface of a solid mesh. No default (Integer > 0) |
|
PORT | Socket Port number for
communication with AcuSolve. This
should be the same as the Default = 10000 (Integer > 0, or blank) |
|
FCNVTOL | Tolerance for exchange
convergence of forces. Default = 0.005 (Real > 0.0, or blank) |
|
DCNVTOL | Tolerance for exchange
convergence of displacements. Default = 0.0001 (Real > 0.0, or blank) |
|
TCNVTOL | Tolerance for exchange
convergence of temperatures (for future use). Default = 0.005 (Real > 0.0, or blank) |
|
FXCNVTOL | Tolerance for exchange
convergence of heat-fluxes (for future use). Default = 0.0001 (Real > 0.0, or blank) |
|
MINEX | Minimum number of
exchanges between OptiStruct and
AcuSolve per time step. 6 Default = 1 (Integer > 0, or blank) |
|
MAXEX | Maximum number of
exchanges between OptiStruct and
AcuSolve per time step. 6 Default = 10 (Integer > 0, or blank) |
|
USETAG |
Each property ID must match the TAG ID
specified by the
(Integer) |
|
FSIDATA | Determines the data to
be exchanged between OptiStruct and
AcuSolve.
(Integer) 4 |
|
WAITTIME | The time in seconds,
that OptiStruct waits (after
pre-processing is complete) for AcuSolve to respond. Default = 3600 (Integer > 0, or blank) |
Comments
- The FSID of a FSI Bulk Data Entry is unique. Multiple FSI Bulk Data Entries with the same FSID cannot be specified in the model.
- FSI Bulk Data Entries can be referenced in a subcase via the FSI Subcase Information Entry. The FSI Bulk Data Entry can be referenced by only one subcase in the model. Only one FSI Subcase Information Entry can be specified in a model.
- FSI Bulk Data can only be referenced by FSI Subcase Information Entry from a Linear Transient Heat Transfer Analysis or Nonlinear Direct Transient Analysis subcase only.
- Currently, only one of Structural Nonlinear Transient Fluid-Structure Interaction (FSIDATA=1/2) or Linear Transient Heat Transfer Fluid-Structure Interaction (FSIDATA=3) is supported in a single model. They both cannot be activated in a single model.
- Data common to OptiStruct and AcuSolve on this entry should be set equal in the input for both solvers.
- The maximum or minimum number of exchanges (MAXEX/MINEX) is set in the OptiStruct model. There may be multiple locations within the AcuSolve model, where the maximum/minimum number of staggers are defined. The FSI run will use the lowest maximum number of exchanges/staggers and the highest minimum number of exchanges/staggers out of all available data specified. Therefore, depending on AcuSolve, each time increment may end within a subset space lesser than or equal to [MINEX,MAXEX].