Mechanical APDL Structural Analysis Guide

6. Leave SOLUTION. You can now review results in the postprocessor.
   Command(s):FINISH
   GUI:Close the Solution menu.

4.8.4. Review the Results of the Expanded Solution

You review results for an expansion pass in the same way that you review results for most structural
analyses. See Review the Results (p. 19) in Structural Static Analysis (p. 9).

You can review these results using POST1. (If you expanded solution at several frequency points, you
can also use POST26 to obtain graphs of displacement versus frequency, stress versus frequency, etc.)
The only POST1 (or POST26) procedure difference between this method and the full method is that if
you requested expansion at a specific phase angle (HREXP, angle) there is only one solution available
for each frequency. Use the SET command to read in the results.

4.8.5. Sample Input.

A sample input listing for a mode-superposition harmonic analysis is shown below:

! Build the Model

/FILNAM,...! Jobname

/TITLE,...! Title

/PREP7! Enter PREP7

---

---! Generate model

---

FINISH

! Obtain the Modal Solution

/SOLU! Enter SOLUTION

ANTYPE,MODAL! Modal analysis

MODOPT,LANB! Block Lanczos

MXPAND,,,,YES.! Expand and calculate element results

D,...! Constraints

SF,...! Element loads

SAVE

SOLVE! Initiate modal solution

FINISH

! Obtain the Mode-Superposition Harmonic Solution

/SOLU! Enter SOLUTION

ANTYPE,HARMIC! Harmonic analysis

HROPT,MSUP,...! Mode-superposition method; number of modes to use

HROUT,...! Harmonic analysis output options; cluster option

LVSCALE,...! Scale factor for loads from modal analysis

F,...! Nodal loads

HARFRQ,...! Forcing frequency range

DMPRAT,...! Damping ratio

MDAMP,...! Modal damping ratios

NSUBST,...! Number of harmonic solutions

KBC,...! Ramped or stepped loads

SAVE

SOLVE! Initiate solution

FINISH

! Review the Results of the Mode-Superposition Solution

/POST26

FILE,,RFRQ! Postprocessing file is Jobname.RFRQ

NSOL,...! Store nodal result as a variable

PLCPLX,...! Define how to plot complex variables

PLVAR,...! Plot variables

FINISH

! Expand the Solution (for Stress Results)

/SOLU! Re-enter SOLUTION

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Mode-Superposition Harmonic Analysis