Search found 74 matches

by Simon.Wiedemann
Tue May 05, 2020 9:03 am
Forum: Structural Analysis
Topic: Extract blade tip torsional deformation from the Wiener-Milenković parameters in BeamDyn
Replies: 3
Views: 1911

Re: Extract blade tip torsional deformation from the Wiener-Milenković parameters in BeamDyn

Hi all, is it correct that the Theta-angle (Inflow) that is available as output in AeroDyn can give the rotational deflection about blade root z-axis when substracted with the fixed aerodynamic twist and the time dependent pitch angle? So: Rotational deflection = Theta at node - aerodynamic twist at...
by Simon.Wiedemann
Wed Apr 29, 2020 1:30 am
Forum: Structural Analysis
Topic: Extract blade tip torsional deformation from the Wiener-Milenković parameters in BeamDyn
Replies: 3
Views: 1911

Re: Extract blade tip torsional deformation from the Wiener-Milenković parameters in BeamDyn

Hi Xiaoqi,

had you been able to calculate the blade tip torsional displacement in BeamDyn?
I have right now the same task.

Best regards,
Simon
by Simon.Wiedemann
Wed Apr 29, 2020 12:43 am
Forum: Structural Analysis
Topic: Processing OpenFast linearization output
Replies: 56
Views: 1627

Re: Processing OpenFast linearization output

Hi Jason,

the fix solved my problem. Thank you.

Best regards,
Simon
by Simon.Wiedemann
Wed Apr 22, 2020 4:57 am
Forum: Structural Analysis
Topic: Processing OpenFast linearization output
Replies: 56
Views: 1627

Re: Processing OpenFast linearization output

Hi Jason, can you lead my to the correct scripts for eigenvalue analysis for OpenFAST 2.2.0 with BeamDyn? Running matlab-toolbox-master\MBC\Source\fx_mbc3.m throws a error at i=13 (modName = 'BD_1'): Index exceeds the number of array elements (1). Error in fx_getMats>getStateOrderingIndx (line 287) ...
by Simon.Wiedemann
Fri Jun 28, 2019 7:01 am
Forum: Computer-Aided Engineering Software Tools
Topic: Boat impact / Point Loading
Replies: 1
Views: 746

Boat impact / Point Loading

Hi there, i try to figure out how to incorperate a boat impact load case for an offshore wind turbine. i) is there any possibility to include a single force dependent on time at water line? ii) If no, would it be feasible to misuse icedyn or icefloe in order to include such a force? Thank you and be...
by Simon.Wiedemann
Wed Jan 30, 2019 6:11 am
Forum: Computer-Aided Engineering Software Tools
Topic: Instructions for Compiling FAST
Replies: 246
Views: 128166

Re: Instructions for Compiling FAST

Dear Jason, unfortunately compilation of OpenFAST is still an issue for me. Could you provide the newest version of OpenFAST (2.0.0 or even 2.1.0) as *.exe for Windows? Can you give a hint on how to compile OpenFAST without Visual Studio as 32bit version on Windows? Thank you very much. Best regards...
by Simon.Wiedemann
Wed Dec 12, 2018 6:15 am
Forum: Computer-Aided Engineering Software Tools
Topic: Instruction for the Seismic fast version
Replies: 17
Views: 2890

Re: Instruction for the Seismic fast version

Hi Jason,

are there any plans to include a/the seismic modul in the latest version of OpenFAST?

Best regards,
Simon
by Simon.Wiedemann
Fri Aug 24, 2018 3:23 am
Forum: Computer-Aided Engineering Software Tools
Topic: Semi-active TMD control using Simulink
Replies: 11
Views: 2690

Re: Semi-active TMD control using Simulink

Dear Jason, the turbine model is self developed. I´m running normal turbulent conditions (IEC ed.3 DLC 1.2). Pitch angle, Rotor speed and other operational parameters match relatively good with BLADED 4.3. I guess, that then the blade model / airfoils is the reason for the error. Could you give a hi...
by Simon.Wiedemann
Thu Aug 23, 2018 8:25 am
Forum: Computer-Aided Engineering Software Tools
Topic: Semi-active TMD control using Simulink
Replies: 11
Views: 2690

Re: Semi-active TMD control using Simulink

ok thank you for clarifying. So I get a lot of warnings but the simulation does not abort as you said. Can you give an advice to reduce the amount of warnings related to invalid phi? Could a simulation with a warning like this be not correct or can I ignore this warning? Thank you and best regards, ...
by Simon.Wiedemann
Thu Aug 23, 2018 5:22 am
Forum: Computer-Aided Engineering Software Tools
Topic: Semi-active TMD control using Simulink
Replies: 11
Views: 2690

Re: Semi-active TMD control using Simulink

Dear Laurin, I'm not sure exactly what, but "something" is triggering an error regarding "no valid value of phi". There were issues in AeroDyn v15.03 within FAST v8.16 that led to this error in some cases. However, these issues have been fixed in AeroDyn v15.04 and newer, includ...
by Simon.Wiedemann
Mon Aug 06, 2018 12:59 am
Forum: Computer-Aided Engineering Software Tools
Topic: Questions about the HydroDyn Module
Replies: 35
Views: 13201

Re: Questions about the HydroDyn Module

Dear Jason, thanks for the explanation. I try to calculate the mass for blade and tower. I take all values from the ElastoDyn summary. So the interpolation from the input to the analysis nodes already took place. I take the values given for the analysis nodes and want to calculate the given masses. ...
by Simon.Wiedemann
Fri Aug 03, 2018 12:54 am
Forum: Computer-Aided Engineering Software Tools
Topic: Questions about the HydroDyn Module
Replies: 35
Views: 13201

Re: Questions about the HydroDyn Module

Dear Yingyi Liu, The integration to find the total blade and tower masses in ElastoDyn is quite simple. I'll explain for the blade; the tower is similar. First, the mass distribution from the blade file (BMassDen) is linearly interpolated to the analysis nodes, which are located in the centers of t...
by Simon.Wiedemann
Thu Aug 02, 2018 8:47 am
Forum: Computer-Aided Engineering Software Tools
Topic: Blade mass in summary file of Elastodyn
Replies: 1
Views: 991

Blade mass in summary file of Elastodyn

Hi all, can someone explain how the mass of the blade, that is output in ElastoDyn's summary, is calculated? I tried some different ideas taking the distributed and interpolated blade properties from the same summary as basis but without success. (I'm using the latest version of OpenFAST with AeroDy...
by Simon.Wiedemann
Mon Jul 23, 2018 12:52 am
Forum: Structural Analysis
Topic: ElastoDyn handeling of Input TMassDen
Replies: 3
Views: 3409

Re: ElastoDyn handeling of Input TMassDen

Dear Jason,

did I got you right, that it is not possible to define point masses in ElastoDyn?
How are you defining additional masses for flanges or internals?
Is there a different option that allows the definition of point masses for tower and or blade?

Best regards,
Simon
by Simon.Wiedemann
Fri Jul 20, 2018 5:21 am
Forum: Structural Analysis
Topic: OC$-Phase II Centre of Gravity and Mass
Replies: 17
Views: 7137

Re: OC$-Phase II Centre of Gravity and Mass

Dear Jason, 1. I fixed the error by selecting at least one output for all three blades, in my case BlPitch1, BlPitch2, BlPitch3. So I guess the case that no triplets of blade outputs is defined leds to an error in fx_mbc3.m. Can you confirm this? 2. I would like to linearize a onshore turbine model ...

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