displacement



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I/O Options and Subcase Information Entry

DISPLACEMENT - Output Request

Description

The DISPLACEMENT command can be used in the I/O Options or Subcase Information sections to request displacement vector output for all subcases or individual subcases respectively.

Format

DISPLACEMENT (sorting,format,form,rotations) = option

Argument

Options

Description

sorting

<SORT1, SORT2>

Default = blank

This argument only applies for PUNCH format (.pch file) output for frequency response and transient subcases. It will be ignored without warning if used elsewhere.

 

SORT1:

Results for each frequency/timestep are grouped together.

 

SORT2:

Results for each grid/element are grouped together.

 

blank:

SORT1 is used for all results except for transient analysis, whereSORT2 is used.  

 

 

 

format

<HM, H3D, OPTI,
PUNCH
, OUTPUT2,
PATRAN
, HG,
APATRAN
, blank>

HM:

Results are output in HyperMesh results format (.res file).

Default = blank

H3D:

Results are output in Hyper3D format (.h3d file).

 

OPTI:

Results are output in OptiStruct results format (.disp file).  

 

PUNCH:

Results are output in Nastran punch results format (.pch file).

 

OUTPUT2:

Results are output in Nastran output2 format (.op2 file).

 

PATRAN:

Results are output in Patran format (multiple files).

 

HG:

Results are output in HyperGraph presentation format (_freq.mvw file and _tran.mvw file) – see OUTPUT keywords HGFREQ and HGTRANS.  

 

APATRAN:

Results are output in Alternative Patran format (multiple files).

 

blank:

Results are output in all active formats for which the result is available.

 

form

<COMPLEX,
REAL
, IMAG,
PHASE
, BOTH>

COMPLEX, blank:

Provides a combined magnitude/phase form of complex output to the .res file if HM output format is chosen. The REAL form of complex output is used for other formats if they are not specifically defined. (Phase output is in degrees).

Default =
COMPLEX

REAL or IMAG:

 

Provides rectangular format (real and imaginary) of complex output.

 

PHASE:

Provides polar format (magnitude and phase) of complex output.  Phase output is in degrees.

 

BOTH:

Provides both polar and rectangular formats of complex output.

 

rotations

<ROTA, NOROTA>

ROTA:

Rotational displacement results are output. Only works with H3D and HM output streams. Rotations are always output with translations for other output streams.

Default = NOTORA

NOROTA:

Rotational displacement results are not output.  Only works with H3D and HM output streams.  Rotations are always output with translations for other output streams.  

 

option

<YES, ALL, NO,
NONE
, SID>

YES, ALL, blank:

Displacement is output
for all grids.

Default = ALL

NO, NONE:

Displacement is not output.

 

SID:

If a set ID is given, displacement is output only for grids listed in that set.

Comments

  1. When DISPLACEMENT command is not present, displacement is output for all grids for all subcases, except for frequency response subcases.

  2. The form argument is only applicable for frequency response analysis. It is ignored for other analysis types.

  3. The form BOTH does not apply to the .frf output files. Results are output to these files using the rectangular form of complex output when BOTH is the chosen form.

  4. Only formats that have been activated by an OUTPUT or FORMAT command are valid for use on this card.

  5. Multiple formats are allowed on the same entry; these should be comma separated. If no format is specified, then this output control applies to all formats defined by OUTPUT or FORMAT commands for which the result is available. See Results Output by OptiStruct for information on which results are available in which formats.

  6. Multiple instances of this card are allowed; if instances are conflicting, the last instance dominates.

  7. For optimization, the frequency of output to a given format is controlled by the I/O option OUTPUT. In previous version of OptiStruct, a combination of the I/O options FORMAT and RESULTS were used; this method is still supported, but not recommended as it does not allow different frequencies for different formats.

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I/O Options Section

Alphabetical List of I/O Options

The Input File

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