Mechanical APDL Structural Analysis Guide

(lily) #1

  • Option: Expansion Pass On/Off (EXPASS)


Choose ON.


  • Option: Number of Solutions to be Expanded (NUMEXP)


Specify the number. This number of evenly spaced solutions will be expanded over the specified
time range. The solutions nearest these times will be expanded. Also specify whether to calculate
stresses and forces (default is to calculate both).


  • Option: Single Solution to Expand (EXPSOL)


Use this option to identify a single solution for expansion if you do not need to expand multiple
solutions in a range. You can specify it either by load step and substep number or by time. Also
specify whether to calculate stresses and forces (default is to calculate both).


  1. Specify load step options. The only options valid for a transient dynamic expansion pass are output
    controls:

    • Output Controls

      • Printed Output (OUTPR)






Use this option to include any results data on the output file (Jobname.OUT).

Note

If element results were calculated in the modal analysis, then no element output is
available in the expansion pass. Use /POST1 to review the element results.


  • Database and Results File Output (OUTRES)


This option controls the data on the results file (Jobname.RST).


  • Extrapolation of Results (ERESX)


Use this option to review element integration point results by copying them to the nodes instead
of extrapolating them (default).

Note

The FREQ field on OUTPR and OUTRES can only be ALL or NONE.


  1. Start expansion pass calculations.
    Command(s):SOLVE
    GUI: Main Menu> Solution> Solve> Current LS

  2. Repeat steps 2, 3, and 4 for additional solutions to be expanded. Each expansion pass is stored as a
    separate load step on the results file.

  3. Leave SOLUTION.
    Command(s):FINISH


Release 15.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information

Performing a Mode-Superposition Transient Dynamic Analysis
Free download pdf