HRCPLX, LOADSTEP, SUBSTEP, OMEGAT, 1STLCASE, 2NDLCASE
Computes and stores in the database the time-harmonic
solution at a prescribed phase angle.
-
LOADSTEP Load step number of the data set to be read (defaults to 1).
-
SUBSTEP Substep number within
LOADSTEP.-
OMEGAT Angle in degrees (Ω (angle) times T (time)).
If ≥ 360°, the amplitude is supplied.
All others supply results at that angle. For example, if the angle is set to 0.0°, the real part of the solution is supplied. If the angle is set to -90° the imaginary part of the solution is supplied.
-
1STLCASE First load case number (defaults to 1).
-
2NDLCASE Second load case number (defaults to 2).
Notes
HRCPLX invokes a macro that combines the real and imaginary parts of the solution. If the angle is specified, it produces the following:
Where:
RR and RI are, respectively, the real and imaginary parts of the results quantity (e.g. the nodal displacements, the reaction forces, ...).
α is the angle (OMEGAT).
1STLCASE and 2NDLCASE are internally generated load cases. You may want to specify these
to avoid overwriting an existing load case number 1 or 2.
Not all results computed by this command are valid. See Summable, Non-Summable
and Constant Data in the Basic Analysis Guide for more information. When
the amplitude of the solution is requested (OMEGAT >= 360°), averaged values (such as the nodal component stresses,
which are an average of element nodal component stresses) are calculated
by averaging the amplitudes. Because the degrees of freedom results
have different phases, derived results (such as the equivalent stress
SEQV) are not valid. See POST1 and POST26 – Complex Results Postprocessing for more details about post-processing
complex results.
For postprocessing amplitudes, the only appropriate coordinate system is the solution coordinate system (RSYS ,SOLU). When displaying the displacement amplitudes, use a contour display (PLNSOL command). Because a deformed shape display (PLDISP command) could lead to a non-physical shape, the displacement scaling is off by default (/DSCALE,,OFF).
For postprocessing cylindrical geometry, it is suggested that
you rotate the element coordinate systems into the appropriate cylindrical
system (EMODIF,,ESYS) before running the
solution and then view the results in this system (RSYS,SOLU) in POST1.
Since HRCPLX performs load case combinations, it alters most of the data in the database. In particular, it alters applied loads such as forces and imposed displacements. To restore the original loads in the database for a subsequent analysis, reissue the SET command in POST1 to retrieve the real and imaginary set data.
To animate the solution over one period, use the ANHARM command.
OMEGAT is not equal to the phase
shift.
This command is not supported after a cyclic symmetry analysis; use /CYCEXPAND,,PHASEANG instead.