Hi,
Is there somebody who use Optistruct to calculate PSD/Random analysis? I know that it's possible, I know how to do that and also I prepare this in my job (I used to work in Nastran, .fem and .bdf files are almost the same).
But I have another question: use somebody this solver in job for this type of analysis? How about results comparison between Optistruct vs. Nastran and Abaqus? I asked, because I heard that it is not good idea to use this solver for dynamic calculations. Have you any examples, comparisons, articles etc. focused on obtained results from this type of analysis?
I prepared similar analysis in Optistruct and Abaqus (our main software for FEA), and RMS stresses are 10% lower in Optistruct (tomorrow I check both models again). I observe that Optistruct solver is much faster when I set output for all frequencies (opti 20min, abaqus 3h 
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So that's why I'm asking about this /emoticons/default_biggrin.png' srcset='/emoticons/biggrin@2x.png 2x' title=':D' width='20' />
Thanks in advance /emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' style='border-style:none;vertical-align:middle;' title=':)' width='20' />
