Search found 14 matches

by Iman.Yousefi
Sun Dec 10, 2017 12:15 am
Forum: Structural Analysis
Topic: Tower first FA mode
Replies: 3
Views: 2246

Re: Tower first FA mode

Dear Jason, Thank you so much for your reply. Yes, all of the parameters you mentioned are exactly the same. The model is quite accurate and is checked carefully. The single soft point of the model is actually the blade airfoils which are not accurate because I do not access the precise parameters. ...
by Iman.Yousefi
Thu Dec 07, 2017 11:21 pm
Forum: Structural Analysis
Topic: Tower first FA mode
Replies: 3
Views: 2246

Tower first FA mode

Hello! I faced a problem with tower first FA mode. When I compute it in BModes, it gives a good agreement with measurement (about 0.35 Hz); but the result of analysis the FAST output file is quite different (about 0.45 Hz). The way I computed this factor in FAST, is to plot the power spectrum densit...
by Iman.Yousefi
Tue Aug 23, 2016 2:45 am
Forum: Computer-Aided Engineering Software Tools
Topic: problem about the turbulence intensity of the wind
Replies: 1
Views: 940

problem about the turbulence intensity of the wind

Hello! To test a model of the wind turbine, I need to generate wind with different conditions. The turbulence intensity of the wind depends on the wind speed (according to 6.3.1.3 Normal Turbulence Model, IEC 61400-1 ed3). For example for 10 m/s it should be 7.875. So I generated the wind with using...
by Iman.Yousefi
Mon May 09, 2016 11:57 pm
Forum: Computer-Aided Engineering Software Tools
Topic: problem in uniform wind file
Replies: 9
Views: 1076

problem in uniform wind file

Hello! I'm simulating a wind turbine machine using Simulink. It's working and there is no problem. I want to change the wind condition, so I tried "steady" and "binary TurbSim" options inside InFlow to test the model, and there is again no problem. However when I want to test the...
by Iman.Yousefi
Wed Apr 06, 2016 8:57 pm
Forum: Computer-Aided Engineering Software Tools
Topic: S-Function Problem
Replies: 0
Views: 4078

S-Function Problem

Hello! I have a problem in running FAST models in Simulink. For instance, running the prepared model (Test01.fst) in Simulink will result in the following error: Error using Run_Test01_SIG (line 35) Error due to multiple causes. Caused by: Error using Run_Test01_SIG (line 35) Error while obtaining s...
by Iman.Yousefi
Mon Dec 14, 2015 5:19 am
Forum: Structural Analysis
Topic: Cross moment of inertia
Replies: 1
Views: 1494

Cross moment of inertia

Dear all, I'm using BModes to analysis the mode frequency of a specific wind turbine. The first part is to analyse the tower modes. To do this, I need to determine a few parameters inside BModes main file. However, I don't have any idea about cross moment of inertia (Ixy, Izx and Iyz) . Would you pl...
by Iman.Yousefi
Tue Nov 17, 2015 2:31 am
Forum: Computer-Aided Engineering Software Tools
Topic: "Allocating Space" error in running Fast
Replies: 1
Views: 4036

"Allocating Space" error in running Fast

Hello! Recently I faced a problem in running FAST. I built a model for an offshore wind turbine. I also used FAST V8.08. It used to work properly , however recently I got this error. When I use FAST_Win32 I face: " Message from HydroDyn_Init: HydroDyn_Init: Error allocating space for the distri...
by Iman.Yousefi
Fri Oct 23, 2015 2:34 am
Forum: Computer-Aided Engineering Software Tools
Topic: S-Function Compiling
Replies: 1
Views: 9483

S-Function Compiling

Hello! I recently installed MATLAB R2015b, and also downloaded the latest version of FAST. I need to run the simulations in Simulink, however due the different MATLAB version which is used to compile, I need to re-compile the .mex file. For that, I installed MinGW-w64 from mathworks; but still I hav...
by Iman.Yousefi
Tue Jun 02, 2015 3:13 am
Forum: Controls
Topic: Generator Model
Replies: 2
Views: 3106

Re: Generator Model

Dear Jason,

Thank you very much.

Regards,
by Iman.Yousefi
Mon Jun 01, 2015 4:12 am
Forum: Controls
Topic: Generator Model
Replies: 2
Views: 3106

Generator Model

Dear friends,

Hi!

Is there any document and/or simulations among NREL documents, centering on generator behavior analysis and modeling?
I need to understand the behavior of electric parts, and any type of generator would be regarded.

Thanks,
Iman
by Iman.Yousefi
Wed May 20, 2015 11:35 pm
Forum: Controls
Topic: FAST 8.10 Test Cases 18-25
Replies: 2
Views: 3020

Re: FAST 8.10 Test Cases 18-25

Dear Jason,

Thank you very much.

Regards,
by Iman.Yousefi
Wed May 20, 2015 11:34 pm
Forum: Computer-Aided Engineering Software Tools
Topic: FAST 8.10 Test Cases 18-25 in Simulink
Replies: 5
Views: 3781

Re: FAST 8.10 Test Cases 18-25 in Simulink

Dear Bonnie,

Thank you very much for your explanations. It is solved.

Regards,
by Iman.Yousefi
Wed May 20, 2015 4:17 am
Forum: Computer-Aided Engineering Software Tools
Topic: FAST 8.10 Test Cases 18-25 in Simulink
Replies: 5
Views: 3781

FAST 8.10 Test Cases 18-25 in Simulink

Dear all, I've downloaded the new version of FAST, namely FAST 8.10. I want to use the Simulink Interface, so I read this article https://wind.nrel.gov/nwtc/docs/README_FAST8.pdf . I could run the test cases 1-17, but I couldn't run 18-25. The error is written below: " Error using Run_OpenLoop ...
by Iman.Yousefi
Wed May 20, 2015 1:01 am
Forum: Controls
Topic: FAST 8.10 Test Cases 18-25
Replies: 2
Views: 3020

FAST 8.10 Test Cases 18-25

Dear all, I've downloaded the new version of FAST, namely FAST 8.10. I want to use the Simulink Interface, so I read this article https://wind.nrel.gov/nwtc/docs/README_FAST8.pdf . I could run the test cases 1-17, but I couldn't run 18-25. The error is written below: " Error using Run_OpenLoop ...

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