WEIS: how to setup a single OpenFAST run of a geometry generated by WEIS/WISDEM

Wind & Water Computer-Aided Engineering Software Tools
1

Hi,
I’ve consulted the WEIS documentation, but I am going around in circles.
Can you point me to the most relevant example, among the WEIS examples (or maybe a combination of them), to do the following?

  1. After creating a new geometry yaml file for a different tower geometry for the IEA 15MW UMaine semisub (I understood how to do it), generate the PpenFAST input files for this modified configuration
  2. Run a simple OpenFAST simulaiton, with constant wind speed, PLExp = 0.12, no turbulence, no waves, no currents, at rated wind speed
  3. I think I know how to read the outb file and where this is, to then extract the final average platform tilt angle. It’s mainly step 1 and 2 I am a bit confused about.

Initially I thought it is something along the lines of examples/02_run_openfast_cases, but in the README.rd file it explicitly says that “These examples run an OpenFAST model that has not been generated by WISDEM”

Many thanks for the help

2

Hi Maurizio,

WEIS examples 03, 04, 05, and 06 all use a yaml file to generate an OpenFAST model. To accomplish what you want, I suggest:

  • Grab a python driver file from the examples and edit it to point to your geometry yaml file with the customized tower geometry
  • Suppress optimization in the analysis options file
  • Set the OpenFAST InflowWind options in your modeling options file to get your designed uniform flow properties. This draft upgrade to the docs will probably help.

Apologies if I have oversimplified your question by skipping steps. Feel free to follow up.

Cheers,
Garrett

3

Thanks, @Garrett.Barter.
I started from example 06, and I have a few questions.

  1. When using weis_driver_umaine_semi.py , and therefore modeling_options.yaml, why the following modeling options is true, if it is for a floating wind turbine?
FixedBottomSE:
        flag: True
        soil_springs: True
  1. When running this weis_drivey_umaine_semi.py, I encounter the following error:
  File "C:\Users\mauri\miniforge3\envs\weis-env\Lib\site-packages\openfast_io\FAST_writer.py", line 2361, in write_MoorDyn
    ln.append('|'.join([float_default_out(a, trim=True) for a in self.fst_vt['MoorDyn']['EA'][i]]))
                                                                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^
TypeError: 'aeroelastic' <class FASTLoadCases>: Error calling compute(), 'numpy.float64' object is not iterable

The files I’m using are the same as in the github repository example 06

Any clue?