How to generate a Steady Wind Input file with a step of 1 m/s for the IEA 15 MW monopile?

[Fede-274]

I am testing the "IEA 15 MW monopile" under steady wind (e.g. 7 m/s) just in the x direction... Now, I want to test it under a wind profile that has a step in wind velocity (e.g. 7 m/s --> 8 m/s in 1 second). I want to impose this step once that the oscillation of the tower has become stationary and analyze the new transient. How can I resolve this issue?

[dzalkind]

I use these functions to do what you suggest:

• https://github.com/NREL/ROSCO/blob/632c502db8df41311554ac2f24c08a0ea52b84d9/rosco/toolbox/ofTools/case_gen/CaseLibrary.py#L158
• https://github.com/NREL/ROSCO/blob/main/rosco/toolbox/ofTools/case_gen/run_FAST.py

You can also configure the InflowWind setup in OpenFAST manually.

[Fede-274]

How would I have to manually change the InflowWind setup to impose the velocity step? The file that you are referring is the one in the folder "IEA-15-240-RWT"? (attached photo)

How would I have to change it?

[dzalkind]

The process should be described in the InflowWind documentation: https://openfast.readthedocs.io/en/main/source/user/inflowwind/index.html