ansys.mapdl.core.Mapdl.plmc#
- Mapdl.plmc(lstep='', sbstep='', timfrq='', kimg='', hibeg='', hiend='', **kwargs)#
Plots the modal coordinates from a mode-superposition solution.
Mechanical APDL Command: PLMC
- Parameters:
- lstep
str
Plot the solution identified as load step
LSTEP
and substepSBSTEP
- sbstep
str
Plot the solution identified as load step
LSTEP
and substepSBSTEP
- timfrq
str
As an alternative to
LSTEP
andSBSTEP
, plot the solution at the time valueTIMFRQ
(for antype,TRANS) or frequency valueTIMFRQ
(for antype,HARMIC).LSTEP
andSBSTEP
should be left blank.- kimg
int
orstr
Key for plotting real or imaginary solution. Valid only for antype,HARMIC.
0 (or blank)
- Plot the real solution (default).1
- Plot the imaginary solution.2
- Plot the amplitude.
- hibeg
str
For cyclic symmetry solutions, plot the solutions in the harmonic index solution range
HIbeg
toHIend
. Defaults to all harmonic indices (all modes).- hiend
str
For cyclic symmetry solutions, plot the solutions in the harmonic index solution range
HIbeg
toHIend
. Defaults to all harmonic indices (all modes).
- lstep
Notes
plmc plots a histogram of the modal coordinates (the factors which modes may be multiplied by to obtain their contribution to the response) at a certain time point (transient analyses) or frequency point (harmonic analyses). The absolute values of the modal coordinates are plotted. Use xrange to plot only modes in a certain range, if desired.
For transient analyses, a
.rdsp
None file must be available. For harmonic analyses, a.rfrq
None file must be available. The content of these files depends on the outres command settings. Note that the default for mode-superposition transient analysis is to write the reduced displacement file every 4th substep. For more information, see Command Default in the outres command description.For a cyclic harmonic mode-superposition analysis, use the cycfiles command to identify the
.rfrq
None and modal.rst
None file. For other analyses, use theFILE
command to specify the.rdsp
or.rfrq
file.You may limit the plot to display only those modes in a certain harmonic index range. The modes having the same harmonic index are each plotted in a unique color. If there are less than 10 harmonic indices, they are identified in the graphics legend.
This is a graphical representation of the optional
Jobname.mcf
text file (see the trnopt and hropt commands). To print the modal coordinates, use the prmc command. For more information on modal coordinates, see Mode-Superposition Method in the Mechanical APDL Theory Reference.Example Usage
Example Mode-Superposition Harmonic Cyclic Symmetry Analysis with Mistuning
Example: Forced Response with Mistuning and Aero Coupling