Search found 20 matches

by Florence.Haudin
Thu Sep 10, 2020 6:33 am
Forum: Computer-Aided Engineering Software Tools
Topic: Subdyn outputs for specific members and nodes
Replies: 1
Views: 684

Subdyn outputs for specific members and nodes

Good afternoon,
I have questions regarding subdyn outputs when referring to specific members and nodes.
My questions are formulated in the attached file relying on a given example because it countains some pictures.
Many thanks in advance.
Best regards.
Florence Haudin.
by Florence.Haudin
Thu Aug 06, 2020 10:54 am
Forum: Computer-Aided Engineering Software Tools
Topic: Bmodes download
Replies: 14
Views: 1181

Re: Bmodes download

Thanks Jason, I calculated the bending modes with Bmodes and the different coefficients of the 6th order polynomial with ModeShapePolyFitting. I then copied the coefficients in the mode shape section of the Elastodyn Tower file. But when I tried to run the simulation I got the following error messag...
by Florence.Haudin
Thu Aug 06, 2020 10:12 am
Forum: Computer-Aided Engineering Software Tools
Topic: Applying a torque at the tower top
Replies: 1
Views: 302

Applying a torque at the tower top

Good afternoon, I would like to investigate the torsional mode of a tower + monopile (asked in OC6 phase 2). As explained to me, OpenFAST includes a lumped stiffness at the yaw to reproduce the proper behavior. To get the torsional mode shape, one advises me to apply a torque at tower top and look a...
by Florence.Haudin
Mon Aug 03, 2020 12:01 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Bmodes download
Replies: 14
Views: 1181

Re: Bmodes download

Thanks Jason, I am brand new with BMode so sorry in advance if my questions are basic. I have 2 questions. I want to have the modes for the system considered in OC6 phase 2, tower + monopile considered as a land-based system. The first one is related to the mooring system stiffness matrix in .bmi fi...
by Florence.Haudin
Tue Jul 28, 2020 5:18 am
Forum: Computer-Aided Engineering Software Tools
Topic: Bmodes download
Replies: 14
Views: 1181

Bmodes download

Good afternoon,
I am wondering where I can download Bmodes.
I could not find a working link.
Thanks in advance.
Best regards.
Florence Haudin.
by Florence.Haudin
Tue Jun 02, 2020 10:07 am
Forum: Computer-Aided Engineering Software Tools
Topic: axial drag
Replies: 1
Views: 321

axial drag

Good afternoon, I have questions concerning the calculation of axial drag in Hydrodyn. I may have missed it but I could not find in the user manual the formula used for the theory. I guess it is is implemented as in "Definition of the Semisubmersible Floating System for Phase II of OC4" pu...
by Florence.Haudin
Mon Apr 27, 2020 3:13 pm
Forum: Computer-Aided Engineering Software Tools
Topic: Hybrid approach
Replies: 5
Views: 614

Re: Hybrid approach

Thanks Jason, So if I move to Openfast for this case, the calculation is possible with axial and transverse drag for the hybrid approach with a forced motion prescribed from a file. Sorry in fact I had not understood before that moving to openfast instead of using hydrodyn in the standalone mode wou...
by Florence.Haudin
Mon Apr 27, 2020 8:59 am
Forum: Computer-Aided Engineering Software Tools
Topic: Hybrid approach
Replies: 5
Views: 614

Re: Hybrid approach

Hi Jason, Thanks for your answer. Things are ok for me now. I am wondering, still in the forced oscillations case, still in an hybrid approach in the WAMITInputsMod equal to 2 , how can I add axial drag on heave plates. As a summary : - I am taking radiation (added mass and convolution term added as...
by Florence.Haudin
Tue Apr 21, 2020 5:29 am
Forum: Computer-Aided Engineering Software Tools
Topic: Hybrid approach
Replies: 5
Views: 614

Hybrid approach

Good afternoon, I have questions concerning the correct way to use an hybrid approach using parts of Hydrodyn calculations to avoid missing or doubling counting effects. I have already asked questions on the topic but I would like to get stronger convictions. The case I want to treat is drag and rad...
by Florence.Haudin
Mon Feb 03, 2020 6:11 am
Forum: Computer-Aided Engineering Software Tools
Topic: Process stopped
Replies: 3
Views: 811

Process stopped

Hi, I am trying to run a long simulation (11 000 s ) with Openfast using Hydrodyn, Elastodyn et MAP modules. My floating object is a semisubmersible floater with a rigid tower and mooring system (OC6 LC5). Using WaveMod equal to 5, I am imposing the wave elevation with an external file. After 1000 o...
by Florence.Haudin
Fri Dec 06, 2019 7:05 am
Forum: Computer-Aided Engineering Software Tools
Topic: Free decay tests
Replies: 7
Views: 1683

Re: Free decay tests

Dear Jason, Thanks for your answer. In fact that was what I thought I had to do and started to do : freeze unrelevant degrees of freedom, and set to zero mass and inertia. Nervertheless, I still don't really understand what I have to do with the geometric data of the section Turbine Configuration (c...
by Florence.Haudin
Thu Nov 28, 2019 9:31 am
Forum: Computer-Aided Engineering Software Tools
Topic: Free decay tests
Replies: 7
Views: 1683

Re: Free decay tests

Dear Jason, Thanks for your answer. Is it possible with Openfast to run a simulation with Hydrodyn, Moordyn and Elastodyn with nothing on the floater or only a rigid tower for instance but no turbine. I don't understand how to "remove" the tower or the blades in Elastodyn. Thanks in advanc...
by Florence.Haudin
Tue Nov 05, 2019 4:00 am
Forum: Computer-Aided Engineering Software Tools
Topic: Free decay tests
Replies: 7
Views: 1683

Free decay tests

Good morning, I would like to know if there is among the examples provided for openfast, an example of free decay tests for a semi submersible or another platform? I guess that the user has to implement himself the AddCLin matrix taken into account the mooring configuration/parameters? Thanks in adv...
by Florence.Haudin
Wed Aug 07, 2019 11:34 am
Forum: Computer-Aided Engineering Software Tools
Topic: calculation of hydroForce on a given member
Replies: 3
Views: 814

Re: calculation of hydroForce on a given member

Good evening Jason, Thanks for your reply. I indeed was referring to the output of Hydrodyn. I have read the documentation and seen the available outputs. But from what I understand, the member and joints outputs are forces for the strip theory (Drag, inertia at least). I am interested in using the ...
by Florence.Haudin
Wed Aug 07, 2019 9:27 am
Forum: Computer-Aided Engineering Software Tools
Topic: calculation of hydroForce on a given member
Replies: 3
Views: 814

calculation of hydroForce on a given member

Good afternoon,
Is it possible to calculate the hydroForce and hydroMoment of a selected member ?
If yes, is there somewhere an example of the .dat configuration file ?
Thanks in advance.
Best regards.
Florence Haudin.

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