*.out <YES, NO> Default = YES
File Output Controls
Keyword Description
Default frequenc y
Affected files Options Details
CMF Controls output of .cmf files. - *.HM.badel.c mf, *.HM.comp.cm f, *.HM.ent.cmf , *.HM.conn.cm f <YES, NO> Default = YES
OSS Controls output
of .oss file.
- *.oss <YES, NO>
Default = YES
HTML Controls output
of .html file.
- *.html <YES, NO>
Default = YES
Keyword Description
Default frequenc y
Affected files Options Details
of .stat file. Default = YES
Comments
1. Frequency does not apply for any of the keywords where a dash (-) is given as the default frequency in the keywords table above.
2. HGTRANS and HGMBD are currently available for analysis only.
3. HGFREQ, HGTRANS, and HGMBD will only use output requests where a Set ID is specified. For example, if DISPLACEMENT = ALL or DISPLACEMENT(HG) = ALL is given, displacement information will not be present in the presentation, whereas if DISPLACEMENT = 1 or DISPLACEMENT(HG) = 1 is given, displacement information will be present in the presentation for the constituent nodes of Set 1.
4. For HGSENS, ASCSENS, or MSSENS options:
If NOSTRESS or blank: results are printed, but stress, strain, and force responses are ignored.
If ALL or STRESS: results are printed, including stress, strain, and force responses. 5. For HGHIST options:
The integer value given is equal to the sum of the desired options: 1: Design Variable.
2: Objective function and maximum % constraint violation. 4: All non-stress responses.
8: All DRESP2 responses. 16: All DRESP3 responses.
If blank: all of the above are output.
For example: If you want Design Variables and all DRESP2 responses, you would use 9. 6. The DVGRID option creates shape variable definitions for displacement or eigenvector
results of linear static, normal modes, or liner buckling analyses. These shape variable definitions can then be used in subsequent optimizations. This process facilitates the use of "natural" shape functions.
7. For the keywords HM, H3D, HV, ASCII, OPTI, OS, NASTRAN, PUNCH, OP2, OUT2, OUTPUT2, PATRAN and APATRAN, the information provided by the OUTPUT I/O option entry takes precedence over information provided on the older FORMAT and RESULTS I/O option entries.
8. OUTPUT entries are read sequentially; therefore, where multiple OUTPUT entries exist with the same keyword, the last instance is used.
9. If OUTPUT,STAT,NO is defined, the *.stat file is deleted at the end of the run (as long as the run was successful), but the file always exists during the run.
10. OUTPUT,DESIGN takes precedence over the information provided on the older DENSRES I/O option entry. OUTPUT,DESIGN will write design results, at the frequency defined, to all active output formats (HM, H3D, or OPTI), regardless of the frequency chosen for that output format. By default, HM is the only active output format.
11. When CMSMETH is used, or when a full multi-body dynamics run is performed, the CMS stress modes can be written to OP2 format. This only happens when OUTPUT,OP2 (or FORMAT,OP2) is defined. One file for each is generated. Stresses are written for shells and solids, while forces are written for bars/beams and welds. Each mode is written as a static load case with ID equal to the mode index. This output is compatible with FEMFAT by MAGNA.
12. The MODEL/NOMODEL option for OUTPUT, OP2 may be overridden by the PARAM, OGEOM bulk data entry.
13. The FSTHICK keyword generates a file with the .fsthick extension. The file contains bulk data entries for elements (CQUAD4, CQUAD8, CTRIA3, and CTRIA6) contained in free- size design spaces. The element definitions have the optimized thickness defined as nodal thicknesses (Ti) for each element.
14. The HGMODFAC keyword generates a HyperGraph3D presentation providing 3D plots of modal participation factors. The plots display the mode number on the x-axis, the frequency (for frequency response analyses) or time (for transient analyses) on the y- axis and the modal participation factor on the z-axis.
The NORM option normalizes the participation factors with respect to 1.
In HyperGraph3D, it is possible to define cross-sections to generate 2D plots of either: a) Modal participation factor vs. frequency or time for a given number.
b) Modal participation factor vs. mode number at a given frequency or time.
For frequency response analyses, plots are generated for the real part, the imaginary part and the magnitude of the participation factors. Magnitude plot is visible by default, while real and imaginary plots are hidden by default.
15. The H3D output from optimization runs consists of a number of files. The BYSUB/BYITER option allows switching between two modes of H3D output. There is a no default option (BYSUB/BYITER) for analysis runs.
BYSUB (This is the default option for optimization runs) outputs one _des.h3d file for the animation of the optimization history. The frequency of the optimization results in this file is defined by OUTPUT, DESIGN (Default = ALL). In addition, an _si.h3d file for each subcase i is written that contains the history of the analysis results for each subcase. Frequency determines the analysis result output frequency. Optimization results can be written to the subcase files using DENSITY, SHAPE, or THICKNESS output requests.
(Using OUTPUT, H3D, or BYSUB for analysis runs (without optimization) will output the same files as above (except for the _des.h3d file), however no design results or analysis history will be available within the files).
BYITER outputs one .#.h3d file per iteration that contains the optimization and
analysis results for all subcases per iteration. Frequency determines at which iteration these files are created. It overwrites the default of OUTPUT, DESIGN unless an actual OUTPUT, DESIGN statement is present. In the case of a shape optimization, the GRID coordinates of the model in the respective iteration are updated to the new shape. (Using OUTPUT, H3D, or BYITER for analysis runs (without optimization) will output
only one .h3d file since there are no multiple iterations).
16. Results for interior points of external superelements will be output by default to HM, H3D, PUNCH, and OP2 files.
17. If GPSTRESS output is requested in addition to OUTPUT, ADAMSMNF, then nodal stress results for solid elements will be written to the .mnf file.
18. For FSTOSZ options:
Bundles: This specifies the number of ply bundles to be generated per fiber orientation. Method: Ply bundle thicknesses are determined based on the method defined.
ADVFREE: Advanced algorithm with free thicknesses.
ADVMAN: Advanced algorithm with manufacturable thicknesses. SIMFREE: Simple algorithm with free thicknesses.
SIMMAN: Simple algorithm with manufacturable thicknesses.
The advanced algorithm is available for 2, 4 and 8 ply bundles. It takes into account the thickness distribution when generating the ply bundles, which results in a more accurate representation of the original free-sized thickness profile.
Ply bundle thickness can also be multiples of the manufacturable ply thickness.
Ignore: Elements may be ignored in a given ply orientation when their thickness is less than 5% of the maximum thickness. This option is inactive by default.
19. H3DSENS, USER indicates that the user-defined responses should be included in the DSA output. NOUSER indicates that user-defined responses should not be included. In both cases, responses defined through the DSA output request are included in the DSA output.
PFGRID
I/O Options Entry
PFGRID – Output Request for Acoustic Grid Participation
Description
The PFGRID command can be used in the I/O Options section to request output of acoustic grid participation factors for all frequency response subcases. The output will be in the .h3d file.
Format
PFGRID (GRIDS=setg, GRIDF=setfl, FREQUENCY=setf, NULL=ipower, RPCUTOFF=rval, RPDBACUT=rpdba, CONTOUR=YES/NO,PEAKOUT) = setdof/PEAKOUT
Examples PFGRID(FREQUENCY=391)=12 PFGRID(PEAKOUT)=23 PFGRID(PEAKOUT)=PEAKOUT Argumen t Options Description
setg <ALL, NONE, SID>
Default = NONE
ALL: Output acoustic grid participation for all structural grid points at the fluid-structure interface.
NONE: Do not output acoustic grid participation for any structural grid points.
SID: Output acoustic grid participation factors for a set of grids. SID refers to the ID of a SET of type GRID.
setfl <ALL, NONE, SID>
Default = NONE
ALL: Output acoustic grid participation for all fluid grid points at the fluid-structure interface.
NONE: Do not output acoustic grid participation for any fluid grid points.
SID: Output acoustic grid participation factors for a set of grids. SID refers to the ID of a SET of type GRID.
Argumen t
Options Description
setf <ALL, SID> Default = ALL
ALL: Participation factors are processed for all excitation frequencies.
SID: Participation factors are only processed for a set of excitation frequencies. SID refers to the ID of a SET of type FREQ.
ipower <INTEGER> Default = 30
When the magnitude of a grid participation is below 10 to the minus ipower, the grid participation will not be output. In other words, if the grid participation is less than 10-ipower, the result output for this grid will be skipped.
rval <REAL> Default = 0.0
The grid participation will be calculated at the excited
frequencies when the magnitude of the pressure is above rval. The excitation frequency will be a subset of setf.
rpdba <Non- Negative REAL>
Default = 0.0
RPDBACUT is the decibel pressure cutoff value for fluid
responses, and is similar to RPCUTOFF. It will take precedence over RPCUTOFF for fluid responses. A weighting is applied to RPDBACUT values at the excitation frequency. The grid participation will be calculated when the magnitude of the response is about the cutoff value. See comment 4 for decibel calculations and reference pressure settings.
CONTOUR (YES/NO) Default = YES
If CONTOUR is specified as YES, the area projected value for the fluid grid participation is output. Otherwise, the output of fluid grid participation would be the actual complex value.
PEAKOUT If PEAKOUT is present as an option inside the parenthesis of the PFGRID data, then the filtered frequencies from the PEAKOUT data will be considered for output of grid participation.
Argumen t Options Description setdof/ PEAKOUT <SID/ PEAKOUT>
Degrees of freedom for which the grid participation factors are to be processed. SID refers to the ID of a SET of type GRID. If “PEAKOUT” is specified instead of SID, the output will be considered at the filtered frequencies corresponding to the degree of freedom in the PEAKOUT card in the bulk section. Comments
1. Output is to the H3D file only.
2. Acoustic grid participation factors are available in a coupled frequency response analysis (both in direct and modal frequency response).
3. The FREQUENCY keyword can be used to select a subset of excitation frequencies available.
4. The dB value is calculated using 20 * log10(P/P0), where P0 is the reference pressure. The reference pressure is dependent on the units specified on the UNITS input data. If the units are SI, the value is set as 2.0E-5 Pa. If they are CGS, it is set as 2.0E-4 barye. If they are MPa, it is set as 2.0E-11 MPa. If they are BG or EE, then it is set as 4.17E-7 lbf/ft2. If no UNITS data is present, the default value is 2.0E-11 MPa.