Modeling of rotor imbalance with BeamDyn

Discuss theory and modeling of wind-turbine structures.

Moderator: Bonnie.Jonkman

Jens.Geisler
Posts: 12
Joined: Fri Jan 17, 2020 7:12 am
Organization: University of Applied Sciences Flensburg
Location: Germany
Contact:

Modeling of rotor imbalance with BeamDyn

Postby Jens.Geisler » Tue Jan 21, 2020 1:58 am

Hi everyone,
is there any way I can model a rotor mass imbalance when using BeamDyn for the blade dynamics?
In ElastoDyn there are three individual files for the blade properties, so I can make one blade a bit heavier. But with BeamDyn there is only one file for all three blades, so all blades must be identical.
Is there maybe an alternative way like e.g. offsetting the hub or something?
BR,
JG

Jason.Jonkman
Posts: 4952
Joined: Thu Nov 03, 2005 4:38 pm
Location: Boulder, CO
Contact:

Re: Modeling of rotor imbalance with BeamDyn

Postby Jason.Jonkman » Tue Jan 21, 2020 6:12 am

Dear Jens,

Actually, there are three distinct BeamDyn input files listed in the FAST / OpenFAST primary input file, BDBldFile(1-3).

Best regards,
Jason Jonkman, Ph.D.
Senior Engineer | National Wind Technology Center (NWTC)

National Renewable Energy Laboratory (NREL)
15013 Denver West Parkway | Golden, CO 80401
+1 (303) 384 – 7026 | Fax: +1 (303) 384 – 6901
nwtc.nrel.gov

Jens.Geisler
Posts: 12
Joined: Fri Jan 17, 2020 7:12 am
Organization: University of Applied Sciences Flensburg
Location: Germany
Contact:

Re: Modeling of rotor imbalance with BeamDyn

Postby Jens.Geisler » Tue Jan 21, 2020 6:16 am

Ahhh,
sorry, I didn't realize that the three individual BeamDyn files are in the main .fst file as opposed to ElastoDyn, where the induvidual blade properties are located inside the driver file.

[Edit] posted four minutes too late :-(


Return to “Structural Analysis”

Who is online

Users browsing this forum: No registered users and 1 guest