Search found 16 matches

by Danupon.Subanapong
Thu Dec 05, 2019 12:22 am
Forum: Computer-Aided Engineering Software Tools
Topic: Mode shapes for Floating offshore wind turbine
Replies: 1
Views: 149

Mode shapes for Floating offshore wind turbine

Hello!!! I am working with floating offshore wind turbine modeling in FAST. However, I have a little confuse about the tower mode shapes. I use BModes to derive mode shapes. I would like to ask if we need to use a tower only mode shape or tower with a floater mode shape. Also, BModes does consider f...
by Danupon.Subanapong
Wed Apr 24, 2019 7:56 am
Forum: Computer-Aided Engineering Software Tools
Topic: How to input platform motions time series and observe the responses.
Replies: 3
Views: 806

Re: How to input platform motions time series and observe the responses.

Dear Jason Jonkman, Thank you so much for your quick reply. I understood that it is not possible in FAST/OpenFAST. However, I know that FAST has interface with Orcaflex. In Orcaflex, the motions can be specified as input. So, the tower load responses can be obtained from FAST output. However, as far...
by Danupon.Subanapong
Wed Apr 24, 2019 3:42 am
Forum: Computer-Aided Engineering Software Tools
Topic: How to input platform motions time series and observe the responses.
Replies: 3
Views: 806

How to input platform motions time series and observe the responses.

Hello, I am now working on Floating Offshore wind turbine modelling. I have to give FAST the platform motions as an input in order to see the responses caused by effect of floater motion. I have been using FAST for a while, but only see that FAST can give initial displacement(s). So, I would like to...
by Danupon.Subanapong
Mon Feb 18, 2019 9:36 pm
Forum: Computer-Aided Engineering Software Tools
Topic: User defined spectrum from routine UserWaveSpctrm in HydroDYn
Replies: 8
Views: 1442

Re: User defined spectrum from routine UserWaveSpctrm in HydroDYn

Thank you so much for your kind response. It is very clear and helpful.
Best Regards,
Danupon Subanapong
by Danupon.Subanapong
Mon Feb 18, 2019 9:35 am
Forum: Computer-Aided Engineering Software Tools
Topic: User defined spectrum from routine UserWaveSpctrm in HydroDYn
Replies: 8
Views: 1442

Re: User defined spectrum from routine UserWaveSpctrm in HydroDYn

Thank you so much for your reply. As you said This routine is called once per frequency at model initialization and receives the frequency (in rad/s) and direction (in degrees) of the wave component as input and returns the one-sided power-spectral density (PSD) (in m^2/(rad/s)) of the wave componen...
by Danupon.Subanapong
Sun Feb 17, 2019 8:53 pm
Forum: Computer-Aided Engineering Software Tools
Topic: User defined spectrum from routine UserWaveSpctrm in HydroDYn
Replies: 8
Views: 1442

User defined spectrum from routine UserWaveSpctrm in HydroDYn

Hello!!! I am now modeling floating offshore wind turbine with semi-submersible platform by using FAST v.8. I have a question about the HydroDyn module. Since I have measured frequency wave spectrum , I am thinking about using "user-defined spectrum from routine UserWaveSpctrm option" in W...
by Danupon.Subanapong
Sun Feb 17, 2019 6:56 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Directional Wave Spreading
Replies: 2
Views: 517

Re: Directional Wave Spreading

Thank you so much!!!!
by Danupon.Subanapong
Sat Feb 16, 2019 6:35 am
Forum: Computer-Aided Engineering Software Tools
Topic: Directional Wave Spreading
Replies: 2
Views: 517

Directional Wave Spreading

Hello!!! I have a question about directional wave spreading in HydroDyn. As far as I understand, HydroDyn can include directional wave spreading function using cos-2s model. A small s which is the directional wave spreading parameter is a function of frequency. However, I found that the input of s i...
by Danupon.Subanapong
Thu Feb 07, 2019 9:23 am
Forum: Structural Analysis
Topic: Eigenvalue Analysis of OC3 Hywind
Replies: 1
Views: 1441

Eigenvalue Analysis of OC3 Hywind

Hello!!! I am working with modelling of FOWT in FAST v.8. In ElastoDyn input, the mode shape of each tower modes is necessary to be inputted. I used BModes to derive those mode shapes. However, before I use it to model 2MW FOWT I checked the values of mode shapes used in ElastoDyn of OC3 Hywind proj...
by Danupon.Subanapong
Tue May 15, 2018 8:15 am
Forum: Computer-Aided Engineering Software Tools
Topic: FAST theory manual
Replies: 253
Views: 33952

Re: FAST theory manual

Dear Jason Jonkman,
I would appreciate if you can send me the "Unofficial FAST Theory Manual" as well. My email is danupon_mick@hotmail.com. Thank you so much.
by Danupon.Subanapong
Mon Mar 05, 2018 8:05 am
Forum: Computer-Aided Engineering Software Tools
Topic: Linearization with FAST v7, obtain mass matrix
Replies: 2
Views: 787

Re: Linearization with FAST v7, obtain mass matrix

Dear Jason,
Thank you so much for your quick reply.
by Danupon.Subanapong
Mon Mar 05, 2018 4:45 am
Forum: Computer-Aided Engineering Software Tools
Topic: Linearization with FAST v7, obtain mass matrix
Replies: 2
Views: 787

Linearization with FAST v7, obtain mass matrix

Dear Jason, I would like to ask some quesions about how to get mass matrix from FAST v.7 linearization. I am calculating the tower top mass properties for the input in BModes. I did try to calculate it by hand, but I doubt that the tower top mass properties in BModes (ixx_tip, iyy_tip, izz_tip) are ...
by Danupon.Subanapong
Mon Apr 17, 2017 1:44 am
Forum: Structural Analysis
Topic: BModes
Replies: 1
Views: 1507

BModes

Hello!! Now, I am studying about the BModes to generate the mode shapes for FAST. But my first task of the project is to find the modal mass of the fixed bottom wind turbine. I am not quite sure about how to output the modal mass from BModes. 1) Is it possible to do it? 2) If not, what is your sugge...
by Danupon.Subanapong
Wed Jul 27, 2016 9:17 pm
Forum: Structural Analysis
Topic: Sway Rocking Model
Replies: 2
Views: 923

Re: Sway Rocking Model

Dear Jason
Thank you so much for your reply
by Danupon.Subanapong
Wed Jul 27, 2016 1:49 am
Forum: Computer-Aided Engineering Software Tools
Topic: Instructions for Compiling FAST
Replies: 200
Views: 117355

Re: Instructions for Compiling FAST

Hi, I am trying to compile FAST 7.02.00d-bjj using visual studio2015 with Intel parallel studio 2016. I followed the instructions (http://wind.nrel.gov/public/bjonkman/DesignCodes/FASTCompilingInstructions.pdf). I got a lot of errors during debugging. Majority of them are caused by the followings. e...

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