Search found 103 matches

by Yingyi.Liu
Wed Apr 14, 2021 3:37 am
Forum: Computer-Aided Engineering Software Tools
Topic: Call for Papers, special issue "Offshore Wind Turbine Dynamic Analysis" in JMSE (IF: 2.033)
Replies: 0
Views: 847

Call for Papers, special issue "Offshore Wind Turbine Dynamic Analysis" in JMSE (IF: 2.033)

Dear Colleagues and Friends, We are currently running a special issue in the Journal of Marine Science and Engineering (2020 Impact Factor: 2.033, Q2) entitled “Offshore Wind Turbine Dynamic Analysis”. The special issue is now open for manuscript submission until 31 May 2021. Manuscripts addressing ...
by Yingyi.Liu
Sat Jan 02, 2021 12:22 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Release of a new open-source BEM code HAMS as a substitution of WAMIT, AQWA, WADAM, Hydrostar, etc
Replies: 1
Views: 895

Release of a new open-source BEM code HAMS as a substitution of WAMIT, AQWA, WADAM, Hydrostar, etc

Dear colleagues and friends, I am happy to let you know that a new open-source BEM code for wave analysis of offshore structures has been released on GitHub for months. The code is named HAMS (Hydrodynamic Analysis of Marine Structures) and has been developed by me for nearly a decade. Last year I ...
by Yingyi.Liu
Thu Jul 09, 2020 3:41 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Interface for DISCON and an inhouse aerodynamic code
Replies: 3
Views: 808

Re: Interface for DISCON and an inhouse aerodynamic code

Dear Jason,

Thanks. Do you mind sending that DNV GL documentation (the part of Controller) to me, or just implying the name of the documentation?
My email is: liuyingyi@riam.kyushu-u.ac.jp

Best regards,
Yingyi
by Yingyi.Liu
Thu Jul 09, 2020 2:58 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Interface for DISCON and an inhouse aerodynamic code
Replies: 3
Views: 808

Interface for DISCON and an inhouse aerodynamic code

Dear Jason, I would like to connect DISCON.ll with my own aerodynamic code. I find the Fortran code of DISCON made by you in the Appendix of the NREL 5MW Baseline Turbine Manual https://www.nrel.gov/docs/fy09osti/38060.pdf What confuses me is the interface of DISCON? Could you explain a bit more abo...
by Yingyi.Liu
Fri Mar 13, 2020 1:11 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Coupling CFD code with FAST/OpenFAST
Replies: 25
Views: 5552

Re: Coupling CFD code with FAST/OpenFAST

Dear Jason, Following your answers, we successfully achieve the agreement between the FAST built-in Potential method (PropPot = True) and Morison method (PropPot = False). However, we find a new problem which relates with a parameter WaveTMax in the HydroDyn input file. We compare the results calcul...
by Yingyi.Liu
Thu Feb 20, 2020 3:03 am
Forum: Computer-Aided Engineering Software Tools
Topic: Coupling CFD code with FAST/OpenFAST
Replies: 25
Views: 5552

Re: Coupling CFD code with FAST/OpenFAST

Dear Jason, Yes, you are correct, I have not changed other settings in the HydroDyn input file. Regarding the two settings you mentioned above, I have questions: (1) Should SimplCa = 0.969954 be used only in Morison model? and in potential solution SimplCa should be 0 ? (2) I notice that the HydroDy...
by Yingyi.Liu
Wed Feb 19, 2020 10:33 am
Forum: Computer-Aided Engineering Software Tools
Topic: Coupling CFD code with FAST/OpenFAST
Replies: 25
Views: 5552

Re: Coupling CFD code with FAST/OpenFAST

Dear Jason, Following your instructions, we performed a calculation with the FAST Test24 CertTest. Note that in the legend, 'FAST-Morison' stands for calculation with the built-in functionality of FAST using the complete Morison model (PotMod=0 and PropPot=FALSE, WaveMod=1); 'FAST-Potential' stands...
by Yingyi.Liu
Wed Feb 19, 2020 10:28 am
Forum: Computer-Aided Engineering Software Tools
Topic: Coupling CFD code with FAST/OpenFAST
Replies: 25
Views: 5552

Re: Coupling CFD code with FAST/OpenFAST

Dear Jason,

I substitute FAST_x64 with OpenFAST v2.2, it works. OpenFAST v2.2 will report error when an incorrect "WvKinFile" is given.

Thanks a lot.

Yingyi Liu
by Yingyi.Liu
Thu Feb 13, 2020 7:27 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Coupling CFD code with FAST/OpenFAST
Replies: 25
Views: 5552

Re: Coupling CFD code with FAST/OpenFAST

Dear Jason, To make sure whether there is a bug in the source code, I then change the setting of WvKinFile to "TEST_004", and provide the wave kinematics files with a name of "TEST_004" in the same folder "/5MW_Baseline" (This model can be downloaded from https://archiv...
by Yingyi.Liu
Thu Feb 13, 2020 10:47 am
Forum: Computer-Aided Engineering Software Tools
Topic: Coupling CFD code with FAST/OpenFAST
Replies: 25
Views: 5552

Re: Coupling CFD code with FAST/OpenFAST

Dear Jason, Another question we want to ask is regarding the FAST Test 23 MIT-NREL-TLP. By setting WaveMod=6 and without specifying the input of WvKinFile in the HydroDyn setting file (which means there is no incident wave), FAST is still able to run and generate some result. Why it is able to? And ...
by Yingyi.Liu
Thu Feb 13, 2020 10:37 am
Forum: Computer-Aided Engineering Software Tools
Topic: Coupling CFD code with FAST/OpenFAST
Replies: 25
Views: 5552

Re: Coupling CFD code with FAST/OpenFAST

Dear Jason, Following your instructions, we performed a calculation with the FAST Test24 CertTest. Note that in the legend, 'FAST-Morison' stands for calculation with the built-in functionality of FAST using the complete Morison model (PotMod=0 and PropPot=FALSE, WaveMod=1); 'FAST-Potential' stands ...
by Yingyi.Liu
Thu Dec 19, 2019 1:43 am
Forum: Computer-Aided Engineering Software Tools
Topic: Coupling CFD code with FAST/OpenFAST
Replies: 25
Views: 5552

Re: Coupling CFD code with FAST/OpenFAST

Dear Jason, Thanks. I can understand that the first 8 analysis nodes as listed in the Test_004.sum file are exactly the 8 member joints as defined in the Test_004.dat file (HydroDyn primary input file) with the JointID ranging from 1~8. (1) However, for the 9~16th nodes in Test_004.sum, I'm not able...
by Yingyi.Liu
Wed Dec 18, 2019 1:46 am
Forum: Computer-Aided Engineering Software Tools
Topic: Coupling CFD code with FAST/OpenFAST
Replies: 25
Views: 5552

Re: Coupling CFD code with FAST/OpenFAST

Dear Jason, At the bottom of Page 15 of the HydroDyn_manual, it was mentioned that "Each of these files must have exactly WaveTMax/DT rows and N whitepace-separated columns, where N is the total number of internal HydroDyn analysis nodes (corresponding exactly to those written to the HydroDyn s...
by Yingyi.Liu
Fri Nov 15, 2019 7:59 am
Forum: Computer-Aided Engineering Software Tools
Topic: Coupling CFD code with FAST/OpenFAST
Replies: 25
Views: 5552

Re: Coupling CFD code with FAST/OpenFAST

Dear Jason, I checked the HydroDyn (HD_v2.05.00) package, inside the folder \CertTest there is a sample case file Test_004.dat in which WaveMod=6 is enabled. However, it seems that all the given files for Test_004 are output files generated by HydroDyn, and I'm not able to find the file which is exa...
by Yingyi.Liu
Thu Nov 07, 2019 12:22 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Coupling CFD code with FAST/OpenFAST
Replies: 25
Views: 5552

Re: Coupling CFD code with FAST/OpenFAST

Dear Jason, Thanks. Indeed, we have not decided what a floating type to be used in this study. I can understand that the way you mentioned applies to a spar type. But how about if the floater is a semisubmersible platform like the OC4 DeepCwind semi, combined by several columns and bracings, does th...

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