Search found 565 matches

by Bonnie.Jonkman
Sat May 08, 2010 9:17 am
Forum: Computer-Aided Engineering Software Tools
Topic: Problem in running Linearisation for Test13
Replies: 27
Views: 8648

Re: Problem in running Linearisation for Test13

We intentionally took the inflow out of FAST v7.00.00a-bjj to aid in modularizing our codes. FAST no longer knows the details of the HH wind input file, so it can't print those values. As a result, the linearization summary file shows all zeros for the operating points from the inflow (wind input di...
by Bonnie.Jonkman
Fri May 07, 2010 9:27 am
Forum: Computer-Aided Engineering Software Tools
Topic: Simulink input_len and AeroDynV13 HH_Init
Replies: 1
Views: 1212

Re: Simulink input_len and AeroDynV13 HH_Init

Hi, Antonio. Sorry you've had some trouble. Hopefully this will help: ...trying to run FAST under the Simulink interface, I keep getting an error telling that variable input_len does not exist, and that I should run Read_Fast_Input.m, even if I already initialised the variables as stated in the FAST...
by Bonnie.Jonkman
Mon May 03, 2010 6:29 am
Forum: Computer-Aided Engineering Software Tools
Topic: Moment (about z axis) at the tower top and bottom
Replies: 5
Views: 2324

Re: Moment (about z axis) at the tower top and bottom

You can see the format of the Bladed-style files in Appendix E of the TurbSim User's Guide ( http://wind.nrel.gov/designcodes/preprocessors/turbsim/TurbSim.pdf ); notice in particular equation E-5, which shows the lateral position of the grids. If Bladed no longer changes the lateral position based ...
by Bonnie.Jonkman
Mon May 03, 2010 5:40 am
Forum: Computer-Aided Engineering Software Tools
Topic: Compiling FAST with IVF
Replies: 20
Views: 9209

Re: Compiling FAST with IVF

Hi, Toby. First of all, I'm glad you got the script to work. IVF 11 with Visual Studio 2008 has become more versatile, but also more complicated to work with. As you found out, you'll need to change the script to set the IVF environment variables correctly. I think it might be mighty convenient to e...
by Bonnie.Jonkman
Thu Apr 29, 2010 6:40 am
Forum: Computer-Aided Engineering Software Tools
Topic: FAST compiled with G95- reading full-field wind
Replies: 6
Views: 2723

Re: FAST compiled with G95- reading full-field wind

Toby, We have had people successfully compile FAST v7.00.00a-bjj with Intel Fortran for Linux, and I've compiled A2AD 13.00.00a-bjj with the old Compaq Visual Fortran compiler so I assume FAST will compile with CVF, too (it uses the same Fortran 2003 features as FAST). However, I have not heard from...
by Bonnie.Jonkman
Thu Apr 29, 2010 6:15 am
Forum: Computer-Aided Engineering Software Tools
Topic: Moment (about z axis) at the tower top and bottom
Replies: 5
Views: 2324

Re: Moment (about z axis) at the tower top and bottom

When AeroDyn uses TurbSim's Bladed-style binary FF wind file (".wnd"), it also needs to read the ".sum" file to determine how to scale the binary data. Bladed does not read this ".sum" file, but you should make sure it uses the same mean wind speed and TI values that ar...
by Bonnie.Jonkman
Mon Apr 26, 2010 6:55 am
Forum: Computer-Aided Engineering Software Tools
Topic: Moment (about z axis) at the tower top and bottom
Replies: 5
Views: 2324

Re: Moment (about z axis) at the tower top and bottom

One possibility is that Bladed and FAST/AeroDyn are not reading the full-field (FF) wind file in the same way. I'm not sure how you are creating the wind file (I assume you are using the same file in both programs), but the "clockwise" flag in the wind ".sum" summary file was add...
by Bonnie.Jonkman
Tue Apr 13, 2010 5:59 am
Forum: Computer-Aided Engineering Software Tools
Topic: Generator Power and FAST version 7.0
Replies: 2
Views: 1555

Re: Generator Power and FAST version 7.0

Hi, Scott. GenPwr is an input (from Simulink) to the FAST S-Function block. It sounds like you are calculating this from GenSpeed and GenTq? Are you applying the generator efficiency, GenEff, in this calculation? The new Matlab script stores some extra variables from the FAST input file (e.g., GenEf...
by Bonnie.Jonkman
Fri Apr 09, 2010 6:07 am
Forum: Computer-Aided Engineering Software Tools
Topic: Compiling FAST with IVF
Replies: 20
Views: 9209

Re: Compiling FAST with IVF

Hi, Javier. I wouldn't worry too much about the warnings about skipping the optimizations. We have briefly tested the run times for FAST compiled with IVF 11.1 (which gives the warnings below) compared with the code compiled with IVF 10.1 (which does not produce the warnings). In the comparison, the...
by Bonnie.Jonkman
Wed Mar 31, 2010 10:26 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Updated NWTC Design Codes Available on Our Web Site
Replies: 7
Views: 4948

Updated NWTC Design Codes Available on Our Web Site

Hello, Design-Codes Users. It is with great excitement that we announce the release of new versions of several of our NWTC Design Codes, which we've uploaded to our Web site: FAST v7.00.00a-bjj (http://wind.nrel.gov/designcodes/simulators/fast/), ADAMS2AD (A2AD) v13.00.00a-bjj (http://wind.nrel.gov/...
by Bonnie.Jonkman
Mon Mar 29, 2010 1:16 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Compiling FAST in Windows 7 with CVF
Replies: 1
Views: 1102

Re: Compiling FAST in Windows 7 with CVF

Hi Javier, We plan to release updated versions of FAST, AeroDyn, and Adams2AD this week. The new FAST archive will include a batch file that can be used to compile FAST with AeroDyn and the NWTC Library. It is set up for the Intel Visual Fortran compiler for Windows, but it should be "easy"...
by Bonnie.Jonkman
Thu Mar 25, 2010 11:04 am
Forum: Computer-Aided Engineering Software Tools
Topic: ADAMS - AeroDyn: problems generating DLL file
Replies: 1
Views: 1221

Re: ADAMS - AeroDyn: problems generating DLL file

Hi, Alex. I answered a related question on a different thread ( https://wind.nrel.gov/forum/wind/viewtopic.php?f=4&t=333 ), so I'll just make a suggestion here. If you have installed Adams 2005 r2, you must call "ADAMS05r2" instead of "ADAMS05". I'd hate for you to get crazy....
by Bonnie.Jonkman
Thu Mar 25, 2010 10:58 am
Forum: Computer-Aided Engineering Software Tools
Topic: ADAMS / AeroDyn interface
Replies: 6
Views: 4623

Re: ADAMS / AeroDyn interface

Hi, Alex. The CompileLinkA2AD.bat file is only used to create the Adams dll. The file is independent of the Adams model, the AeroDyn input file, and wind files (so it doesn't really matter if those files exist or are in the folder). And, as long as you have downloaded Adams2AD, AeroDyn, and/or FAST ...
by Bonnie.Jonkman
Wed Mar 03, 2010 2:52 pm
Forum: Inflow Turbulence
Topic: question concerning TurbSim (V1.5)
Replies: 13
Views: 12719

Re: question concerning TurbSim (V1.5)

Hi, Stefan. There are typically two things that will cause the average hub-height wind speed to differ significantly from TurbSim's reference wind speed: (1) the reference height input in TurbSim is not the turbine hub height (i.e., RefHt /= HubHt), or (2) the record length (AnalysisTime) is not the...
by Bonnie.Jonkman
Fri Jan 29, 2010 2:33 pm
Forum: Computer-Aided Engineering Software Tools
Topic: FAST: Wind direction changes
Replies: 10
Views: 3748

Re: FAST: Wind direction changes

Hieu, The 4-D wind files contain the 3-component wind velocities at each time and position on a 3-D spatial grid (X,Y,Z). The files we have are one instance of a LES simulation of a non-dimensional KH-billow, and we have created an input file (*.lep) that scales it. I would NOT recommend that you tr...

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