FASTFARM Moordyn v2 issue

[lucamholden-arch]

Hi, im trying to run fastfarm with the ocw3 spar turbines, I copied over the turbines and all the dyn modules from the r-test from openfast into fastfarm and made and fsft file from this. The code runs until it get to moordyn. I beleive its because i have a v1 file from the rtest and need a v2. how do i convert this or even better where can i find a v2 moordyn file for this ?

[jjonkman]

Dear @lucamholden-arch,

The MoorDyn input file provided with the OpenFAST model of the OC3-Hywind spar in the OpenFAST r-test (which is what I assume you are using) is compatible with MoorDyn v2, even though this specific r-test uses MAP++ instead of MoorDyn: https://github.com/OpenFAST/r-test/blob/main/glue-codes/openfast/5MW_OC3Spar_DLL_WTurb_WavesIrr/NRELOffshrBsline5MW_OC3Hywind_MoorDyn.dat. What error are you getting when you switch CompMooring from 1 to 3 in OpenFAST, which is what I presume you are doing?

Best regards,

[lucamholden-arch]

Hi thanks, I switched to a different MoorDyn file to match my wind farm layout, but since have gotten these errors, Whilst the simulation begins to run i get these warnings and then once it runs i get this error. Do you know how to fix this?

[jjonkman]

Dear @lucamholden-arch,

Presumably you mean that these errors are independent of your MoorDyn change. The errors imply that your OpenFAST models have aerodynamic analysis nodes in AeroDyn that fall outside of the high-resolution domains that you have defined in FAST.Farm. Are your high-resolution domains in FAST.Farm centered around the wind turbines and do they extend lower than 10 m above mean sea level, where it appears your lowest aerodynamic analysis nodes are located?

Best regards,

[lucamholden-arch]

Hi Jjonkman, i appreciate your help, i'm a masters student using openfast and fastfarm for my final year project so all help is great but I think ive got this all wrong so i think i need to change some things but don't want to start a new issue maybe you can help. So i copied over all the ocw3 spar files from open fast, then got a fsft and moordyn file from this github https://github.com/[FloatingArrayDesign/FASTFarm_10Turbines_Shared](https://github.com/FloatingArrayDesign/FASTFarm_10Turbines_Shared) which i know is skipping steps but i was abit lost and have since tried to run it and i think thats whats causing errors.

I have now started following the openfast toolbox in python to make my own cases, this is where i am now abit lost with it all. I am new to python aswell but have alot of matlab experience. Following example 2a in this toolbox for fastfarm i've filled these in and think they are correct

I have then tried to change the pass at the bottom to a main as suggested by copilot, but this then gives these errors . This is where i question the image above this as they are not in the .T format but i could not find these .T templates anywhere at all

i'm pretty sure im not meant to be running this anyway as its only an example, can you guide me to where i should be inputting all this stuff to get my completed fsft files and turbsim.inp files and the other stuff. to add onto this how far am i from being able to run a working scenario as at the moment i am starting to lose abit of faith, but i'm sure i am not far away, and if this is the case can you guide me in that direction
I am sorry this is quite long but am really abit stuck at the moment and would really appreciate any help you can provide
Best wishes, Luca

[rthedin]

When creating a FAST.Farm input deck, the toolbox makes copies of the ElastoDyn input for each turbine. By convention of the toolbox, files that get copied on a per-turbine basis have their names entered ending in .T. The Ex2a has this example input for ElastoDyn, and similarly you can see from your screenshot the comments after the entries for SimplifiedElastoDyn, as well as HydroDyn and MoorDyn. The error getting printed is also descriptive, saying Name the template ED file "*.T.dat" and give "*.T" as "EDfilename".

[lucamholden-arch]

Perfect, thanks i have now solved that issue, but further in the code i have now ran into this which i can't seem to get rid off.

I can see alot of errors here and would like some guidance on how to fix them, also I was wondering if either if you could provide a process to which i actually finish the python script and get a fsft output? Am i able to do this from this example 2a or do i need to move all my info to a different script and run that?

[rthedin]

This is the third time this has been reported. Fixed in OpenFAST/openfast_toolbox#68.

[lucamholden-arch]

Thanks fixed that now, ive come across an issue with the hydrodata path. Its saying that the process cant access the file because its being used by another process. I put a copy command in and even when i remove a file from hydrodata it pulls the next one as the issue. This may just be a python thing instead of the fastfarm example, but i am new to python and would appreciate some advice on this, Best wishes, Luca

[rthedin]

This is an issue with permissions and your OS. Unfortunately I'm not able to help you there. If your original issue has been solved, please close this issue; otherwise let us know what other issues you might be having. If you run into issues with the openfast_toolbox, I suggest you open issues on that repository instead.