ANHARM, NFRAM, DELAY, NCYCL, NPERIOD, CMS_ANTYPE, CMS_MODOPT
Produces an animated sequence of
time-harmonic results or complex mode shapes.
NFRAMNumber of frame captures per cycle. Defaults to 12.
DELAYTime delay (seconds) during animation. Defaults to 0.1 seconds.
NCYCLNumber of animation cycles. Defaults to 5. Not available in the GUI.
NPERIODPeriod number for the second set of frames showing the decay or growth of a mode shape. Only applies to complex mode shape animation. Defaults to 1, animating the decay or growth on the first period. Issue -1 to animate without decay or growth.
CMS_ANTYPEAnalysis type performed in the CMS use pass. No default.
MODAL | — | Modal analysis |
HARMIC | — | Harmonic analysis |
CMS_MODOPTMode extraction method selected in the CMS use pass. No default.
UNSYM | — | Unsymmetric matrix |
DAMP | — | Damped system |
QRDAMP | — | Damped system using QR algorithm |
ANHARM invokes an ANSYS macro which produces an animated sequence of:
In both cases, the results are those of the last plot action (for example, PLNSOL,B,SUM).
The animation converts the complex solution variables (real
and imaginary sets) into time varying results over one period. For
example, if NFRAM = 12, then the frame
captures are in increments of 30 degree phase angles.
A second set of NFRAM frames will
be generated for damped eigenmodes from complex eigensolvers to visualize
any exponential decay or growth of the oscillations. The second set
generated will display frames from the period number specified by NPERIOD.
In a CMS analysis, the ANHARM command can be used after the CMS expansion pass or the use pass.
To use ANHARM after the expansion pass, you must
indicate whether a modal analysis or a harmonic analysis was performed
in the CMS use pass by setting CMS_ANTYPE to either MODAL or HARMIC. If the use pass was a modal analysis,
you must also set the CMS_MODOPT field
to indicate the mode extraction method that was used (UNSYM, DAMP,
or QRDAMP). If CMS_MODOPT = QRDAMP, it
is assumed that CPXMOD was set to ON in
the MODOPT command to request complex eigenmodes.
If the ANHARM command is used after the use pass,
it is not necessary to set the CMS_ANTYPE or CMS_MODOPT arguments.
For more information about complex results postprocessing, see POST1 and POST26 – Complex Results Postprocessing in the Mechanical APDL Theory Reference