Search found 6 matches

by Felipe.Alcantara
Sat May 02, 2020 3:26 pm
Forum: Wave Energy
Topic: Significant Wave Height
Replies: 4
Views: 831

Re: Wave Loads On Fixed Wind Turbine

Dear Jason, I would like to know if i can get the distributed hydrodynamic loads of waves on the substructure portion above the MSL. I've enabled the second order waves and put an output point righ above the MSL, so that is is located between the mean sea level and the significant wave amplitude. Ho...
by Felipe.Alcantara
Fri Apr 03, 2020 5:32 pm
Forum: Computer-Aided Engineering Software Tools
Topic: FAST theory manual
Replies: 317
Views: 47988

Re: FAST theory manual

Dear Dr Jonkman,

Can you please send me the "Unofficial FAST Theory Manual"? felipejalcantara@poli.ufrj.br

Thank you,

Kind regards
Felipe.
by Felipe.Alcantara
Mon Mar 30, 2020 3:26 pm
Forum: Structural Analysis
Topic: Turning off Unsteady aerodynamics and no valid value of phi.
Replies: 25
Views: 1532

Re: Turning off Unsteady aerodynamics and no valid value of phi.

Dear Jason, I looked at some posts related to "large blade deflection" and i decided to reduce the time step, it worked. I stoped receiving the warnings and the simulation ran normally. However, I was looking at the YawBrFxp time series and i am not sure if it is how it's supposed to be. T...
by Felipe.Alcantara
Mon Mar 30, 2020 11:34 am
Forum: Structural Analysis
Topic: Turning off Unsteady aerodynamics and no valid value of phi.
Replies: 25
Views: 1532

Re: Turning off Unsteady aerodynamics and no valid value of phi.

Dear Jason, I followed your advice and turned off the computation of aerodynamic loads. Then i received the following message: "FAST_Solution:FAST_AdvanceStates:ED_ABM4:ED_CalcContStateDeriv:SetCoordSy:Small angle assumption violated in SUBROUTINE SmllRotTrans() due to a large blade deflection ...
by Felipe.Alcantara
Mon Mar 30, 2020 8:12 am
Forum: Structural Analysis
Topic: Turning off Unsteady aerodynamics and no valid value of phi.
Replies: 25
Views: 1532

Re: Turning off Unsteady aerodynamics and no valid value of phi.

Dear Jason, Thank you for answering so quickly. Yes, i am pretty sure i am using OpenFAST. In order to upgrade from FAST v8.16 to OpenFAST, i replaced the AeroDyn 15.03 inpute file by the Aerodyn 15.04 input file and ran the .fst file with the OpenFAST_x64.exe. Is there something else i should have ...
by Felipe.Alcantara
Mon Mar 30, 2020 7:45 am
Forum: Structural Analysis
Topic: Turning off Unsteady aerodynamics and no valid value of phi.
Replies: 25
Views: 1532

Re: Turning off Unsteady aerodynamics and no valid value of phi.

Dear sir/madame, I was having no problem running some analysis with diferent environmental conditions on the 5MW_Baseline offshore monopile wind turbine that i got when i donwloaded the FAST v8.16 files. However, once i changed the tower and substructure properties, in the ElastoDyn, AeroDyn, SubDyn...

Go to advanced search