- Mapdl.coval(tblno1='', tblno2='', sv1='', sv2='', sv3='', sv4='', sv5='', sv6='', sv7='', **kwargs)¶
Defines PSD cospectral values.
APDL Command: COVAL
First input PSD table number associated with this spectrum.
Second input PSD table number associated with this spectrum.
- sv1, sv2, sv3, … , sv7
PSD cospectral values corresponding to the frequency points [PSDFRQ].
Defines PSD cospectral values to be associated with the previously defined frequency points. Two table references are required since values are off-diagonal terms. Unlike autospectra [PSDVAL], the cospectra can be positive or negative. The cospectral curve segment where there is a sign change is interpolated linearly (the rest of the curve segments use log-log interpolation). For better accuracy, choose as small a curve segment as possible wherever a sign change occurs.
Repeat COVAL command using the same table numbers for additional points. This command is valid for SPOPT,PSD only.
This command is also valid in PREP7.