@Jason.Jonkman
Dear Jason,
Thank you very much for your fast answer!
I probably expressed myself in a misleading way… I can visualize offshore support structure after you gave me this hint in my previous question here 
https://forums.nrel.gov/t/create-and-visualize-jacket-structure/6232/2
Now, I just want to plot modes shapes like this:
How can I extract the data for plotting mode shapes using linearization?
BR,
Heike