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IEAWindTask37 / IEA-15-240-RWT

15MW reference wind turbine repository developed in conjunction with IEA Wind
Apache License 2.0
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#Request the geometric characteristics of the blade cross-section# #121

Closed li-Bjut closed 1 year ago

li-Bjut commented 1 year ago

Hello, I am a graduate student, and I am currently working on projects related to offshore wind turbines. I would like to build a complete IEA-15MW model in the ABAQUS software, requiring the section bending stiffness and torsional stiffness of the blade and the section area. In the Openfast input file(IEA-15-240-RWT_ElastoDyn_blade.dat) I found BMassDen, FlpStff, EdgStff. But EAStff and GJStff I can t find. The curve of torsional stiffness is mentioned in the IEA 15MW definition file, and I tried to take the value from the curve. But clearly the results are not accurate. So I would like to know if it is convenient for you to provide the blade of EAStff and GJStff. Thanks. Regards, Anna

gbarter commented 1 year ago

You can find the full 6x6 mass & stiffness matrices for the blade in the OpenFAST BeamDyn file

li-Bjut commented 1 year ago

Thank yuo for your reply. I have just browsed this file and found the mass and stiffness matrices of 26 sections. I think the area of the blade section I have been able to solve. But the torsional stiffness of the blade I still don't get to. Any reply from you would be greatly appreciated. Thanks, Anna

gbarter commented 1 year ago

@ptrbortolotti can hopefully comment on the torsional stiffness

ptrbortolotti commented 1 year ago

Hello Anna, ElastoDyn does not have the torsional degree of freedom, you need to extract it from either the BeamDyn file https://github.com/IEAWindTask37/IEA-15-240-RWT/blob/master/OpenFAST/IEA-15-240-RWT/IEA-15-240-RWT_BeamDyn_blade.dat or this excel https://github.com/IEAWindTask37/IEA-15-240-RWT/blob/master/Documentation/IEA-15-240-RWT_tabular.xlsx, tab Blade Structural Properties. Torsional stiffness is K66 (along z axis) Best regards, Pietro

ptrbortolotti commented 1 year ago

K66 is also available here https://github.com/IEAWindTask37/IEA-15-240-RWT/blob/3a00f7f38a6373f6b026aef5878b671ca7af3605/WT_Ontology/IEA-15-240-RWT.yaml#L334. It's the last element of each array

li-Bjut commented 1 year ago

Thank you so much for your reply, and my question was solved. Best regards, Anna