Search found 8 matches

by Guo.Wu
Wed Dec 05, 2018 12:23 am
Forum: Controls
Topic: Linearization of the full system
Replies: 7
Views: 1694

Re: Linearization of the full system

Dear Dr. Jonkman,

Thank you very much for your advice.
by Guo.Wu
Tue Dec 04, 2018 6:40 pm
Forum: Controls
Topic: Linearization of the full system
Replies: 7
Views: 1694

Re: Linearization of the full system

Dear Dr. Jonkman, Another approximative method I am thinking about is that. An additional section will be added at the bottom of the tower. The length and stiffness of the added section will be adjusted to make sure the mean displacement of the tower bottom will as same as the displacement when the ...
by Guo.Wu
Tue Dec 04, 2018 2:46 am
Forum: Controls
Topic: Linearization of the full system
Replies: 7
Views: 1694

Re: Linearization of the full system

Dear Dr. Jonkman,

Many thanks for your fast reply, I will consider your solution , and I am looking forward to the update of openfast.
by Guo.Wu
Mon Dec 03, 2018 6:45 pm
Forum: Controls
Topic: Linearization of the full system
Replies: 7
Views: 1694

Linearization of the full system

Hello Everybody, I am working on a kind of floating wind turbine platform by openfast. I should work out the linearization model for the design of control DLL. But maybe openfast can not cover linearization of the full system at this stage from the topic "The frequency component of flapwise&quo...
by Guo.Wu
Wed Oct 10, 2018 7:05 pm
Forum: Rotor Aerodynamics
Topic: Problem of Beamdyn coupled with Aerodyn
Replies: 4
Views: 3353

Re: Problem of Beamdyn coupled with Aerodyn

Dear Jason, After debug again and again, I found that the aborting problem of my model is generated by wrong definition of section Mass Matrix of blade. The iEdg should be usually larger than iFlp, and that is the case in Nrel 5MW model. But iEde is smaller than iFlp in my model. After fixed this pr...
by Guo.Wu
Mon Sep 24, 2018 8:44 pm
Forum: Rotor Aerodynamics
Topic: Problem of Beamdyn coupled with Aerodyn
Replies: 4
Views: 3353

Re: Problem of Beamdyn coupled with Aerodyn

Dear Jason, Thank you very for your kind reply. The complete messages OpenFAST writes to the screen is very long, so I just attached the last print. You are right. The warning message of " no valid value of phi" happened frequently but not lead to software aborting. And I found that Vy bec...
by Guo.Wu
Thu Sep 20, 2018 3:14 am
Forum: Rotor Aerodynamics
Topic: Problem of Beamdyn coupled with Aerodyn
Replies: 4
Views: 3353

Problem of Beamdyn coupled with Aerodyn

Dear Jason, I am trying to model a fixed foudation wind turbine by OpenFAST_X64.exe -v1.0.0 with setting (CompElast=2, CompInflow=1,CompAero=1,CompServo=0).And the DT(module time step) is 0.0005 s in global. OpenFast is aborted with the following error. FAST_Solution:FAST_AdvanceStates:AD_UpdateStat...
by Guo.Wu
Thu Aug 16, 2018 1:32 am
Forum: Computer-Aided Engineering Software Tools
Topic: FAST theory manual
Replies: 222
Views: 29365

Re: FAST theory manual

Dear Jason,

Could you please also send me a copy of the "Unofficial FAST Theory Manual".
Thank you very much for your time.

My email address is 12476719@qq.com

Best regards,

Go to advanced search