Good afternoon,
I would like to investigate the torsional mode of a tower + monopile (asked in OC6 phase 2). As explained to me, OpenFAST includes a lumped stiffness at the yaw to reproduce the proper behavior. To get the torsional mode shape, one advises me to apply a torque at tower top and look at the rotations along the tower and monopile.
I just don’t know how to apply a torque. Do I have to use the Tower_Top_Loads.dat as explained in the attached pdf file (OpenFAST_Prescribing_Loads_at_Tower_Top.pdf) ?
Then I am not sure of the probe I have to look for.
Finally, is there somewhere a documentation for Elastodyn? I may have missed it or everything needed is explained in the Openfast manual I guess.
Many thanks in advance.
Best regards.
Florence Haudin.
OpenFAST_Prescribing_Loads_at_Tower_Top.pdf (1.01 MB)