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by Bonnie.Jonkman
Wed Apr 14, 2021 2:35 pm
Forum: Wind Farm Modeling
Topic: Error in running TurbSim
Replies: 22
Views: 5995

Re: Error in running TurbSim

The error you are showing indicates a problem in the source code. I would first check if the TurbSim executable from OpenFAST has the same issue (you can download a pre-compiled binary here: https://github.com/OpenFAST/openfast/releases). If that still gives the error, please report this bug by crea...
by Bonnie.Jonkman
Tue Dec 08, 2020 9:57 am
Forum: Controls
Topic: Compiling DISCON.F90 on Linux
Replies: 2
Views: 645

Re: Compiling DISCON.F90 on Linux

You need to tell it to build a shared library, otherwise it thinks it is a standalone executable that needs a main() routine. Try gfortran DISCON.F90 -shared -DIMPLICIT_DLLEXPORT -o DISCON.dll (Or maybe you want a different file extension for linux?) Alternatively, the DLLs can be built using cmake....
by Bonnie.Jonkman
Mon Nov 16, 2020 8:55 am
Forum: Rotor Aerodynamics
Topic: Tower base loads due wind effect
Replies: 15
Views: 3296

Re: Tower base loads due wind effect

Is it possible that you are reading the Z component backwards from the .u file? The text files are written with Z this direction: Y(1) Y(2) … Y(nY) |---------------------------- Z(nZ) | Z(nZ-1) | … | Z(1) | I'd recommend applying the time shift to your own files, and comparing time histories at diff...
by Bonnie.Jonkman
Mon Nov 16, 2020 8:33 am
Forum: Computer-Aided Engineering Software Tools
Topic: Linearization Problem in OpenFast V2.3
Replies: 19
Views: 2842

Re: Linearization Problem in OpenFast V2.3

Your screenshot shows that it is looking for the ElastoDyn blade file in the IEA-15_240-RWT directory, but it appears that it is not where it is located. You should open the primary ElastoDyn input file and change the location where it can find the IEA-15_240-RWT_ElastoDyn_blade.dat file. (and note ...
by Bonnie.Jonkman
Tue Nov 10, 2020 1:48 pm
Forum: Rotor Aerodynamics
Topic: Tower base loads due wind effect
Replies: 15
Views: 3296

Re: Tower base loads due wind effect

I don't know how you have defined your nodes, but if you are matching at the hub node and NOT matching as you move out radially from the hub, I would suspect that there is an error in one or more of the position calculations. Perhaps you can calculate the equivalent shift on your plot by matching th...
by Bonnie.Jonkman
Tue Nov 10, 2020 10:58 am
Forum: Rotor Aerodynamics
Topic: Tower base loads due wind effect
Replies: 15
Views: 3296

Re: Tower base loads due wind effect

Riccardo, A few comments: 1. Some older versions of FAST/InflowWind did interpolation differently than the current version. It now does a tri-linear interpolation. 2. When InflowWind reads the FF grid files, it shifts them so that at time zero, the wind field starts half the grid width in front of t...
by Bonnie.Jonkman
Thu Sep 10, 2020 8:44 am
Forum: Computer-Aided Engineering Software Tools
Topic: Issue while converting from FAST v7 to FAST v8
Replies: 1
Views: 458

Re: Issue while converting from FAST v7 to FAST v8

Does your FAST7 file contain a variable called "AeroFile"? It's possible your FAST7 model calls it something else (possibly "ADFile"). If you don't have "AeroFile", change the name of the variable in the input file that points to the file containing AeroDyn input parame...
by Bonnie.Jonkman
Thu Aug 20, 2020 11:18 am
Forum: Wave Energy
Topic: Hydrodynamic Drag loads formulation
Replies: 23
Views: 3764

Re: Hydrodynamic Drag loads formulation

It looks like you are missing a comment line in your HydroDyn input file. Please add the line for the table units as below: ---------------------- MEMBER OUTPUT LIST -------------------------------------- 0 NMOutputs - Number of member outputs (-) [must be < 10] MemberID NOutLoc NodeLocs [NOutLoc < ...
by Bonnie.Jonkman
Wed Aug 19, 2020 8:50 am
Forum: Systems Engineering Software Tools
Topic: Installation of OpenFAST
Replies: 22
Views: 12097

Re: Installation of OpenFAST

1. This issue should be fixed in the "dev" branch of OpenFAST. If you need to use the master branch, you can update the FAST solution file to solve this issue by following the instructions in this GitHub issue: https://github.com/OpenFAST/openfast/issues/509 2. I would guess that the path ...
by Bonnie.Jonkman
Wed Jul 08, 2020 5:37 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Changing TMax to 600s simulation time
Replies: 3
Views: 771

Re: Changing TMax to 600s simulation time

One other comment: The wind file distributed with the sample test cases contains is only about 60 seconds long. We did this to keep the size of the archives a reasonable size. If you want to run a longer simulation, you'll have to use a different wind file.
by Bonnie.Jonkman
Mon Jul 06, 2020 9:31 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Compile Precomp
Replies: 4
Views: 1180

Re: Compile Precomp

Those DLLs are necessary because you built with dynamic libraries instead of static ones. With dynamic libraries, you have a few options: ⋅ To run the code on the machine you compiled with, open the Intel compiler environment command window (this will be on your start menu, under something...
by Bonnie.Jonkman
Wed Jun 24, 2020 8:47 am
Forum: Computer-Aided Engineering Software Tools
Topic: Tendon failure in FAST modeling
Replies: 47
Views: 15835

Re: Tendon failure in FAST modeling

The linking error you show is typically caused by a mismatch between libraries used to link the final executable. I don't recall the details of FAST8 builds, but make sure you are using consistent libraries and compile settings in all the files and projects. The first place I would check is under &q...
by Bonnie.Jonkman
Mon Jun 22, 2020 9:44 am
Forum: Computer-Aided Engineering Software Tools
Topic: Tendon failure in FAST modeling
Replies: 47
Views: 15835

Re: Tendon failure in FAST modeling

I think if you remove the key word "ABSTRACT" from the specification of the three interface statements in OrcaFlexInterface.f90 (reported on lines 114, 127, and 145, the first 3 errors in your attachment), that will solve your issue. This was fixed in OpenFAST a while ago. Older Fortran co...
by Bonnie.Jonkman
Wed Jun 10, 2020 11:32 am
Forum: Computer-Aided Engineering Software Tools
Topic: binary .wnd specification
Replies: 11
Views: 5936

Re: binary .wnd specification

The basic summary file that InflowWind will read should be in this format: https://github.com/old-NWTC/InflowWind/blob/master/Docs/FORMAT_FF_Sum_File.pdf The values in the summary file are used to scale the values from the binary file back to dimensional velocities, so they should be the values you ...
by Bonnie.Jonkman
Tue Dec 03, 2019 9:27 am
Forum: Computer-Aided Engineering Software Tools
Topic: FAST8 Build Model problems
Replies: 3
Views: 1808

Re: FAST8 Build Model problems

I don't have any experience building Simulink models for real-time simulation. I have read some comments about it in the MATLAB/Simulink documentation that I sent you. I do not think you have to modify the header file; I think you need to make sure MATLAB is setting the appropriate preprocessor flag...

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