/CYCEXPAND, WN, OPTION, Value1, Value2
Graphically expands displacements, stresses and strains
of a cyclically symmetric model.
WNThe window number to which the expansion applies. Valid values are 1 through 5. The default value is 1. The window number applies only to the AMOUNT argument.
OPTIONOne of the following options:
ON | — | Activates cyclic expansion using the previous settings (if any). If no previous settings exist, this option activates the default settings. | ||||||||||||
DEFAULT | — | Resets cyclic expansion to the default settings. | ||||||||||||
OFF | — | Deactivates cyclic expansion. This option is the default. | ||||||||||||
STATUS | — | Lists the current cyclic expansion settings. | ||||||||||||
AMOUNT | — | The number of repetitions or the total angle.
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WHAT | — | A specified portion or subset of the model to expand:
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EDGE | — | Sector edge display key.
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PHASEANG | — | The phase angle shift:
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The default /CYCEXPAND command (issuing the
command with no arguments) deactivates cyclic expansion (OPTION = OFF). The default window number (WN) is 1.
In preprocessing, the /CYCEXPAND command verifies a cyclically symmetric model by graphically expanding it partially or through the full 360 degrees.
For the postprocessing plot nodal solution (PLNSOL) operation, the command graphically expands displacements, stresses and strains of a cyclically symmetric model partially or though the full 360 degrees by combining the real (original nodes and elements) and imaginary (duplicate nodes and elements) parts of the solution.
For the print nodal solution (PRNSOL) operation, the command expands the printed output of displacements or stresses on a sector-by-sector basis.
Use of the /CYCEXPAND command does not change the database. The command does not modify the geometry, nodal displacements or element stresses.
The command affects element and result plots only. It has no effect on operations other than plot element solution (PLESOL), plot nodal solution (PLNSOL), print nodal solution (PRNSOL), and calculate harmonic solution (CYCCALC). Operations other than PLESOL, PLNSOL, PRNSOL, or CYCCALC work on the unprocessed real and imaginary parts of a cyclic symmetry solution
If you issue a /CYCEXPAND,,OFF command, you cannot then expand the model by simply issuing another
/CYCEXPAND command (for example, to specify an NREPEAT value for the number of repetitions). In such a
case, you must specify /CYCEXPAND,,ON, which activates expansion using the previous settings (if any)
or the default settings.
The command requires PowerGraphics and
will turn PowerGraphics on (/GRAPHICS,POWER) if not already active. Any setting which bypasses PowerGraphics
(for example, /PBF) also bypasses cyclic expansion;
in such cases, the /CYCEXPAND command displays
unprocessed real and imaginary results.
The CYCPHASE command uses full model graphics
(/GRAPHICS,FULL) to compute peak
values. Because of this, there may be slight differences between max/min
values obtained with CYCPHASE, and those obtained
via /CYCEXPAND, which uses power graphics (/GRAPHICS,POWER).
For PHASEANG = AMPLITUDE (or 360) with a cyclic full harmonic solution, the only appropriate coordinate system is the solution coordinate system (RSYS,SOLU)
To learn more about analyzing a cyclically symmetric structure, see the Cyclic Symmetry Analysis Guide.