force/ELFORCE



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I/O Options and Subcase Information Entry

FORCE - Output Request

Description

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

Format

FORCE (format, form) = option

Argument

Options

Description

format

<H3D, OPTI,
PUNCH, OUTPUT2, blank>

H3D:

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

Default = blank

OPTI:

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

PUNCH:

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

OUTPUT2:

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

blank:

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

 

form

<COMPLEX, REAL,
IMAG, PHASE, BOTH>

Default = COMPLEX

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).

 

 

REAL, IMAG:

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

 

 

PHASE:

Provides polar format (phase and magnitude) of complex output.

 

 

BOTH:

Provides both rectangular and polar formats of complex output.

 

option

<YES, ALL, NO,
NONE, SID>

YES, ALL, blank:

Element force is output for all valid elements.

Default = ALL

NO, NONE:

Force is not output.
 

SID:

If a set ID is given, force is output only for valid elements listed in that set.

Comments

  1. When neither FORCE nor ELFORCE commands are present, force is not output.

  2. FORCE results are available for ELAS (CELAS1, CELAS2, CELAS3, CELAS4), ROD (CROD), BAR (CBAR, CBEAM), BUSH (CBUSH), PLATE (CQUAD, CTRIA), GAP (CGAP), and WELD (CWELD) elements.

  3. The form argument is only applicable for frequency response analysis. It is ignored in other instances.

  4. 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.

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

  6. 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.

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

  8. For optimization, the frequency of output to a given format is controlled by the I/O option OUTPUT. In previous versions 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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