Simlab: Output applied load and reaction force summary

darad
darad Altair Community Member
edited October 2020 in Community Q&A

This turns out really easy in Simlab.   Simply create a text file for input/output with the following:

 

OLOAD

SPCFORCE

 

Near bottom the output *.out file, look for: 

 Subcase:       1 --------------------------------------------------------------------------  Label     x-force    y-force    z-force   x-moment   y-moment   z-moment  -------------------------------------------------------------------------- Sum-App. -1.893E+04  8.693E+04 -7.083E-12 -8.721E+06 -1.899E+06  1.942E+07 Sum-SPCF  1.893E+04 -8.693E+04  1.052E-05  8.721E+06  1.899E+06 -1.942E+07 -------------------------------------------------------------------------- Notes: 1. All applied and SPC forces are transferred to           the origin of the basic coordinate system,           so that the applied and SPC loads can match.        2. If spring elements and/or MPCs exist in the model,           total applied loads may not match total SPC loads.        3. If axisymmetric elements are present in the model,           the total x-force and y-force and all the total           moments are set to zero, according to principles           of axisymmetric analysis.        4. If periodic boundary conditions exist in the model,           total applied loads may not match total SPC loads.

 

In Hypermesh, I believe there are check boxes for outputs for same function.

OLOAD

SPCF

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Answers

  • Kamalraj
    Kamalraj
    Altair Employee
    edited February 2020

    Hi,

     

    You can define and export OLOAD and SPCFORCE cards by using Analysis > Solve > Output Request.

    <?xml version="1.0" encoding="UTF-8"?>image.thumb.png.da0374622f9c51ac602149491fc83254.png

  • darad
    darad Altair Community Member
    edited February 2020

    I just ran cases without the TEXT definitions in Input/Output section for OLOAD and SPCFORCE.

    (1)  No output requests, whatever Optistruct elects to  output

      This produces no OLOAD or SPCFORCE output

    (2) Output Requests for OLOAD = True, and SPCFORCE = solver defaults

      OLOAD =ALL shows in case control, SPCFORCE does not

      no applied force and reaction force summary table is generated

     i.e. SPCFORCE = solver defaults 'negates' OLOAD=True

    (3) Output Requests for OLOAD = no selection, SPCFORCE = Optistruct default

       SPCFORCE = OPTI

      This generates fem input 'SPCFORCE = OPTI', but no OLOAD exists in fem file.

      both OLOAD and SPCFORCE are output to *.out by SPCFORCE=OPTI

    Subcase:       1
    --------------------------------------------------------------------------
     Label     x-force    y-force    z-force   x-moment   y-moment   z-moment 
    --------------------------------------------------------------------------
    Sum-App.  0.000E+00  0.000E+00 -4.448E+03 -3.107E+05  5.544E+05  0.000E+00
    Sum-SPCF  9.364E-09  5.022E-10  4.448E+03  3.103E+05 -5.555E+05 -1.518E+03
    --------------------------------------------------------------------------

     

    4) Output Requests for OLOAD = no selection, SPCFORCE = ALL default

       SPCFORCE = ALL

      This generates fem input 'SPCFORCE = ALL', but no OLOAD exists in fem file.

      both OLOAD and SPCFORCE are output to *.out by SPCFORCE=OPTI

     

    Hence, once SPCFORCE = OPTI or ALL, both applied and reaction force summary table is created in *.out

     

    Best way to assure applied and reaction force without thinking which combination produces what,

    simply insert OLOAD and SPCFORCE in Text Data for Loads and Contraints tab.   Works every time.

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