Dear readers,
I have a very basic question - where can I find the calculated natural frequencies of the different components (e.g. blade, tower…)?
I have searched in different output files, but it seems that I am blind 
- I can’t find the information about the natural frequencies.
From the FFT plots I can get some information, but I guess the natural frequencies are also given somewhere in an output file, right?
BR,
Heike
Dear @Heike.vonWaaden,
The full-system natural frequencies and mode shapes are not directly an output of OpenFAST. In addition to identifying natural frequencies through FFT (or PSD), the linearization functionality of OpenFAST, followed by MBC3 and eigenanalysis can be used to compute the full-system natural frequencies and mode shapes. This topic has been discussed in many other forum posts.
Best regards,
Dear @Jason.Jonkman,
thank you very much for your answer - I appreciate it!
BR,
Heike