Ah, okay, I thought you were asking about Inputs, which I answered. You want to know about Response PSD output like the one for relative acceleration that I show below.
You want to know if you can plot a Response PSD for Force. I don't think so. Maybe someone else will comment.
I know you can obtain the 1 sigma value of the Reaction Force at the Fixed Support.
You are navigating away from the AIS Discovery experience