When I try to perform a random vibration analysis with MDOF load and the correlation between the loading DOF:s described through COVAL and QDVAL, the results spectra are erroneous. The amplitude of the PSD spectra obtained in post26 become partly negative.
Ansys claims that this is an error that can be fixed by including the following lines for 8.0 and that it is fixed in 8.1:
/nerr,,,-1
antyp,spectrum
spopt,psd,,yes,,,,6,500,NUME
However, I still get these errors after including these lines. (In 8.0, have not tried it in 8.1)
Does anyone have any experience with this - or even a fix?
Chers!
Ansys claims that this is an error that can be fixed by including the following lines for 8.0 and that it is fixed in 8.1:
/nerr,,,-1
antyp,spectrum
spopt,psd,,yes,,,,6,500,NUME
However, I still get these errors after including these lines. (In 8.0, have not tried it in 8.1)
Does anyone have any experience with this - or even a fix?
Chers!