GPFORCE
I/O Options and Subcase Information Entry The GPFORCE command can be used in the I/O Options or Subcase Information sections to request grid point force balance output for all subcases or individual subcases, respectively.
Format
GPFORCE (format_list, elem, form, peakoutput, modal, use) = option
Definitions
Argument | Options | Description |
---|---|---|
format | <H3D, OPTI, PUNCH, OP2, PLOT, HDF5, blank> Default = blank |
|
elem (H3D only) | <ELEM, NOELEM> |
|
form | <REAL,
IMAG, PHASE> Default = REAL |
|
peakoutput | <PEAKOUT> Default = blank |
If PEAKOUT is present, only the filtered frequencies from the PEAKOUT card will be considered for this output. |
modal | <MODAL> Default = blank |
If MODAL is present, grid point forces of the structural modes and residual vectors are output to the PUNCH and OUTPUT2 files for Modal Frequency Response and Transient Analysis. |
use | <FBD> Default = blank |
If FBD is present, all the necessary output (SPCFORCE, MPCFORCE, and OLOAD) required for FBD will be triggered automatically. |
option | <YES, ALL,
NO, NONE,
SID> Default = ALL |
|
Comments
- When a GPFORCE command is not present, grid point force balance is not output.
- GPFORCE output is available for the
following solution sequences:
- Solution Sequence
- Output Formats
- Static Analysis
- H3D, OP2, PCH, OPTI
- Normal Modes Analysis
- H3D, OP2, PCH
- Direct Frequency Response Analysis
- H3D, OP2, PCH, OPTI
- Modal Frequency Response Analysis
- H3D, OP2, PCH, OPTI
- Direct Transient Response Analysis
- H3D, OP2, PCH,
- Modal Transient Response Analysis
- H3D, OP2, PCH,
- Nonlinear Transient Response Analysis
- H3D, PCH
- The form argument is only applicable for Frequency Response Analysis. It is ignored in other instances.
- Multiple formats are allowed on the same entry; these should be comma separated. If a format is not specified, this output control applies to all formats defined by the OUTPUT command, for which the result is available.
- Multiple instances of this card are allowed; if instances are conflicting, the last instance dominates.
- For optimization, the frequency of output to a given format is controlled by the I/O option OUTPUT.
- GPFORCE in .op2 output can only be post-processed with the Free Body Diagram (FBD) tools in HyperMesh/HyperView.
- GPFORCE in .h3d output can be used for the Load Transfer Path Analysis with NVH Director. It is only available for Linear Static, Frequency Response, and Acoustic Analyses. An H3D file written with GPFORCE with "use=FBD" (i.e. GPFORCE(FBD)) can be used for FBD in HyperView.
- format=OUTPUT2 can also be used to request results to be output in the Nastran output2 format (.op2 file).
- The HDF5 output is printed to a
.h5 binary results file. For details of the supported
analysis types and elements when the .h5 output format is
requested, refer to the .h5 file.
For details about the old HDF5 format (.hdf5), refer to PARAM, HDF5 and .hdf5 file.