Search found 14 matches

by Yuqi.Cao
Tue May 08, 2018 7:55 pm
Forum: Structural Analysis
Topic: Ansys model tower
Replies: 12
Views: 5937

Re: Ansys model tower

Dear Jason,

Many thanks for your detailed answer. I will try the alpha version. I hope it would provide better results and the difference of the second order mode shape wouldn't lead to a big difference on the load.

Best regards,
by Yuqi.Cao
Mon May 07, 2018 8:22 pm
Forum: Structural Analysis
Topic: Ansys model tower
Replies: 12
Views: 5937

Re: Ansys model tower

Dear Jason, I am testing on the NRELOffshrBsline5MW_Onshore (test18 of FAST v8.16). I am trying to adjust the tower sections, so I check the ElastoDyn file first with BModes. The first order mode shapes fit well, but The second mode shape I got from BModes was quite different from that defined in th...
by Yuqi.Cao
Tue Sep 12, 2017 7:02 pm
Forum: Inflow Turbulence
Topic: How can a wind velocity file be read by the FAST software
Replies: 8
Views: 7388

Re: How can a wind velocity file be read by the FAST software

Dear Jason,
Thank you very much. I will have a try.
Best regards,
Yuqi Cao
by Yuqi.Cao
Tue Sep 12, 2017 1:39 am
Forum: Inflow Turbulence
Topic: How can a wind velocity file be read by the FAST software
Replies: 8
Views: 7388

Re: How can a wind velocity file be read by the FAST software

Dear Yuqi, If you have time series of wind at one point and it is reasonable to assume uniform wind across the rotor (perhaps with shear), then you can use WindType = 2 (uniform wind files) to define your wind. See the InflowWind User's Guide for more information: https://wind.nrel.gov/nwtc/docs/In...
by Yuqi.Cao
Fri Sep 08, 2017 2:03 am
Forum: Inflow Turbulence
Topic: How can a wind velocity file be read by the FAST software
Replies: 8
Views: 7388

How can a wind velocity file be read by the FAST software

Dear all, I am using FAST v8.16 and trying to adopt a InflowFile which contains the wind velocities generated by myself. Then I set the the parameter WindType to be 6 in the input file for In InflowWind v3.01. However, this means the wind velocities will not be read from the file, but be calculated ...
by Yuqi.Cao
Fri Nov 18, 2016 10:47 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Eigenanalysis FAST
Replies: 44
Views: 20246

Re: Eigenanalysis FAST

Dear Jason:
Thank you for your answer. It helps me a lot.
Best regards.
by Yuqi.Cao
Thu Nov 17, 2016 6:34 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Eigenanalysis FAST
Replies: 44
Views: 20246

Re: Eigenanalysis FAST

Dear Jason:
Thank you so much. The detail I want to know is whether the loads to be averaged is the mean loads in a certain realization or the maximum loads. Which is more reasonable?
Best regards.
by Yuqi.Cao
Wed Nov 16, 2016 7:30 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Eigenanalysis FAST
Replies: 44
Views: 20246

Re: Eigenanalysis FAST

Dear Jason: One more question which is very important to me. When building an AF model, it is important to determine the representative load applied at the mudline. In the Memorandum Derivation and Description of the Soil-Pile-Interaction Models written by Patrik Passon, It is the used loads from ph...
by Yuqi.Cao
Wed Nov 16, 2016 6:59 pm
Forum: Structural Analysis
Topic: Compile FAST to model distributed spring model for monopile.
Replies: 15
Views: 10113

Re: Compile FAST to model distributed spring model for monopile.

Dear Jason:
I'll learn the topic "FAST" carefully.
Many thanks and best regards.
by Yuqi.Cao
Tue Nov 15, 2016 9:49 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Eigenanalysis FAST
Replies: 44
Views: 20246

Re: Eigenanalysis FAST

Dear Jason:
Thanks a lot. Your suggestions are inspiring to me. And now, I am wondering in which way the eigenanalysis was conducted in the OC3 project. It seems that it was done with ADAMS. Are there any detailed papers introducing this?
Best regards.
by Yuqi.Cao
Tue Nov 15, 2016 9:30 pm
Forum: Structural Analysis
Topic: Compile FAST to model distributed spring model for monopile.
Replies: 15
Views: 10113

Re: Compile FAST to model distributed spring model for monopile.

Dear Jason: Thanks a lot for your quick response. It really works if the line of WaveNDAmp is deleted. And the following comes that GBRatio must be set to 1.0 when using UserVSCont routine. After the change(GBRatio from 97 to 1), "Small angle assumption violated...FF wind array was exhausted......
by Yuqi.Cao
Tue Nov 15, 2016 2:18 am
Forum: Computer-Aided Engineering Software Tools
Topic: Eigenanalysis FAST
Replies: 44
Views: 20246

Re: Eigenanalysis FAST

Dear all: I tried to study the soil-structure interaction using AF model in FAST v8.16. I know linearization is not implemented for the SubDyn module. Then I wonder which is the best way to get the natural frequency of the whole structure considering SSI. Would you please give some suggestions? Anot...
by Yuqi.Cao
Mon Nov 14, 2016 7:17 pm
Forum: Structural Analysis
Topic: Compile FAST to model distributed spring model for monopile.
Replies: 15
Views: 10113

Re: Re: Compile FAST to model distributed spring model for monopile.

Dear Jason:
I did as you suggested. But the same error occurred. It seems that all data before CURRENT were read. And I copied all the files of the library to the source folder. Does it matter?
by Yuqi.Cao
Sun Nov 13, 2016 1:49 am
Forum: Structural Analysis
Topic: Compile FAST to model distributed spring model for monopile.
Replies: 15
Views: 10113

Re: Compile FAST to model distributed spring model for monopile.

Dear all: I tried to model DS model in FAST v7.02. I did the following: 1. I copied the file "UserTwrLd_DS.f90" to the file folder "source". 2.In "UserTwrLd_DS.f90" I replaced "USE InterpSubs USE Precision" with "USE NWTC_LIbrary".( I couldn't find t...

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