Search found 15 matches

by Arnold.Ramsland
Thu Mar 05, 2020 2:22 pm
Forum: Wave Energy
Topic: Significant Wave Height
Replies: 4
Views: 872

Re: Significant Wave Height

Thank you.
by Arnold.Ramsland
Thu Mar 05, 2020 9:53 am
Forum: Wave Energy
Topic: Significant Wave Height
Replies: 4
Views: 872

Significant Wave Height

Good Morning, I am looking for a value of the significant wave height that would be typical for floating wind turbines. In the Certification Test file, NRELOffshrBsline5MW_OC4DeepCwindSemi_HydroDyn, the significant wave height is entered as 1.2646. Since this value is used in a Certification Test an...
by Arnold.Ramsland
Fri Feb 07, 2020 8:34 am
Forum: Computer-Aided Engineering Software Tools
Topic: Modification of discon.dll
Replies: 3
Views: 1125

Re: Modification of discon.dll

Dear Jason, In my post of Oct 30, 2019, I described the problems in trying to adapt the DLL controller designed for a 5-MW wind turbine to a 3 kW wind turbine. I could not resolve the problem so I increased the size of the wind turbine blades from 1.5 m to 4.5 m with a resulting power of 20 kW and r...
by Arnold.Ramsland
Fri Feb 07, 2020 8:00 am
Forum: Computer-Aided Engineering Software Tools
Topic: clarification of force along axis
Replies: 2
Views: 736

Re: clarification of force along axis

Thank you for your response. Everything worked out well.

Arnold
by Arnold.Ramsland
Mon Jan 13, 2020 11:23 am
Forum: Computer-Aided Engineering Software Tools
Topic: clarification of force along axis
Replies: 2
Views: 736

clarification of force along axis

Hello, It was my understanding that the forces applied to a component was directed along the specified axis. For example, the force specified in RootFxc1 would be directed along the actual x axis. This understanding came into question when using the Fusion 360 FEA simulation program, where the force...
by Arnold.Ramsland
Wed Oct 30, 2019 9:10 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Modification of discon.dll
Replies: 3
Views: 1125

Re: Modification of discon.dll

Hello Dr. Jonkman, Thanks so much for your response. It appears this is much more complicated than I thought it would be. After I sent the post, I considered modifying discon.dll to include a ramp in pitch angle rate during the transition from region 2 to region 3. For example, it may start at .05 r...
by Arnold.Ramsland
Wed Oct 30, 2019 10:45 am
Forum: Computer-Aided Engineering Software Tools
Topic: Modification of discon.dll
Replies: 3
Views: 1125

Modification of discon.dll

Hello, I am in the process of trying to perform a lifetime fatigue study using MLife on a very small blade (1.5 m) with a rotation rate of about 400 rpm. In order to do so, I have been trying to adapt discon.dll to change the pitch angle of the small blade to accommodate wind speeds from 2-30 mps. T...
by Arnold.Ramsland
Thu Jul 11, 2019 9:59 am
Forum: Computer-Aided Engineering Software Tools
Topic: Inhomogen turbulent windfield
Replies: 6
Views: 1951

Re: Inhomogen turbulent windfield

Thanks. Also, I think your group is providing a very valuable resource to start-up companies like mine. I would have no way of testing out new ideas without FAST, MLife, and Turbsim.

Arnold
by Arnold.Ramsland
Mon Jul 01, 2019 10:18 am
Forum: Computer-Aided Engineering Software Tools
Topic: Inhomogen turbulent windfield
Replies: 6
Views: 1951

Re: Inhomogen turbulent windfield

Dear Jason Thanks for the response. Sorry for the late response, however I must have forgotten to hit the submit button in April. Based upon your response, I am planning to build my own computer with a water-cooled, 16 core Threadripper processor. The visualization of output files in VTK format woul...
by Arnold.Ramsland
Fri Jun 28, 2019 10:26 am
Forum: Controls
Topic: "DISCON.dll could not be loaded"
Replies: 2
Views: 4411

Re: "DISCON.dll could not be loaded"

I had the same error statement "DISCON.dll could not be loaded", however the error only occurred when running FAST from a directory other than C. In my case I copied all CertTest files and directories from C: to V:. FAST ran without problem in the C directory. I was able to resolve the pro...
by Arnold.Ramsland
Wed Apr 17, 2019 11:35 am
Forum: Computer-Aided Engineering Software Tools
Topic: Inhomogen turbulent windfield
Replies: 6
Views: 1951

Re: Inhomogen turbulent windfield

Hello, I would expect that FAST.Farm will require a significant increase in computing power. If so, do you have a recommendation for the type of computer that will be necessary? Also, I noted in your response of Jan 17, 2018 the following statement: "the release of our new FAST.Farm tool for mo...
by Arnold.Ramsland
Wed Aug 29, 2018 11:14 am
Forum: Computer-Aided Engineering Software Tools
Topic: Problem running Test18.fst in Simulink by Changing TMax using FAST_8.16
Replies: 60
Views: 11271

Re: Problem running Test18.fst in Simulink by Changing TMax using FAST_8.16

Dear Jason, It was indicated in one of your responses that "alternatively, you could also output the nonrotating bending moments in the low-speed shaft i.e. LSSTipMzs (yaw) and LSSTipMys (tilt)" to establish a feedback for individual pitch control. I have performed modeling of the 5 MW win...
by Arnold.Ramsland
Tue Apr 03, 2018 6:45 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Coordinate System in FAST
Replies: 46
Views: 18587

Re: Coordinate System in FAST

Thank you,

Arnold
by Arnold.Ramsland
Mon Apr 02, 2018 4:41 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Coordinate System in FAST
Replies: 46
Views: 18587

Re: Coordinate System in FAST

Hello, I'd like to follow up on a post dated June 27, 2016 to René where it was stated that ''c1" and "b1" refer to the orientation, not the origin, of the coordinate system by requesting a further clarification of the shaft (xs, ys, zs) and azimuth (xa, ya and za) coordinate systems....

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