Search found 7 matches

by Spencer.Hallowell
Mon Dec 03, 2018 12:34 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Error when running OpenFAST test files
Replies: 1
Views: 828

Error when running OpenFAST test files

Upon a fresh install of OpenFAST on my machine I receive error messages for the majority of the simulations. I installed OpenFAST closely following the instructions found here: https://openfast.readthedocs.io/en/master/source/install/install_cmake_cygwin.html . The land based 5MW baseline linearized...
by Spencer.Hallowell
Wed Oct 19, 2016 11:13 am
Forum: Computer-Aided Engineering Software Tools
Topic: User input kinematics for floater in FAST
Replies: 14
Views: 3676

Re: User input kinematics for floater in FAST

After digging a little more on my 3rd question, it seems that the drop off in the heave direction is due to how the pressures around the floater are implemented. If all of the values in the .DYNP file are set to zero the structure heaves upward. Is this file supposed to have static pressure head add...
by Spencer.Hallowell
Wed Oct 19, 2016 7:32 am
Forum: Computer-Aided Engineering Software Tools
Topic: User input kinematics for floater in FAST
Replies: 14
Views: 3676

Re: User input kinematics for floater in FAST

Hi Jason, thank you for the prompt reply. I am running FAST v8.16, with HydroDyn v2.05, with the Baseline using the OC4 semisub. 1. After making sure 2nd order waves were turned off, I still got wave surface elevations output that did not match the input, as shown in the attached figure, though they...
by Spencer.Hallowell
Tue Oct 18, 2016 9:36 am
Forum: Computer-Aided Engineering Software Tools
Topic: User input kinematics for floater in FAST
Replies: 14
Views: 3676

User input kinematics for floater in FAST

Hello, I have two questions regarding user input waves in FAST v8. I have created user input kinematics and wave time history files for FAST to then import, which it does without error when WaveMod is set to either 5 or 6. My questions are: 1. Why do the wave surface elevation time histories output ...
by Spencer.Hallowell
Thu Jan 15, 2015 9:20 am
Forum: Structural Analysis
Topic: Designing for yaw errors using FAST
Replies: 6
Views: 8541

Re: Designing for yaw errors using FAST

Jason,
Once again thank you for your response and for the reference. I will look through his work to better understand this phenomenon.

Spencer
by Spencer.Hallowell
Wed Jan 14, 2015 2:47 pm
Forum: Structural Analysis
Topic: Designing for yaw errors using FAST
Replies: 6
Views: 8541

Re: Designing for yaw errors using FAST

Hi Jason, Thank you for your response. Are you able to pass along any further information about the work done at DTU on this topic? It would be great to be able to reference a conference paper or journal article citing that the two solutions proposed above are reasonable and generally accepted by in...
by Spencer.Hallowell
Sun Jan 11, 2015 12:49 pm
Forum: Structural Analysis
Topic: Designing for yaw errors using FAST
Replies: 6
Views: 8541

Designing for yaw errors using FAST

Yaw errors.png Hello, I am trying to design monopiles for the NREL baseline 5MW turbine using site specific hurricane hazard according to IEC 61400-3 load case 6.2a, which requires the consideration of all yaw errors from -180 to +180 degrees. I have read some literature mentioning that there is an...

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