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Structural Properties for NREL 5MW Blade for QFEM Analysis
Dear QBlade Developers/Community,
Hello, I’m currently working on a simulation project using QBlade.
I have successfully completed a turbine simulation by defining the necessary parameters (wind speed, significant wave height, etc.). From the results, I was able to extract the panel-specific loads on the blade.
My goal is to accurately determine the structural response of the NREL 5MW blade under these calculated loads using QFEM.
I’ve located the structural definition file, NREL5MW_Blade.str, within the Turbine Definition module. However, it seems impossible to directly import or use the properties defined in this .str file within the QFEM module for a detailed structural analysis.
To run an accurate QFEM simulation, I need the original material properties (used in the Structural Blade Design module) that generated this .str file.
These parameters include : Young’s Modulus (E), Shear Modulus (G), Density (ρ / rho) …and any other relevant variables used in the original structural definition.
Could you please provide the specific material property input variables (E, G, ρ, etc.) that were used to create the original NREL5MW_Blade.str file in the Structural Blade Design section of QBlade?
This information is crucial for me to conduct precise structural analysis on the NREL 5MW blade design.
Thank you very much for your time and assistance.
Best regards,
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Hello,
The QFEM module in QBlade enables the creation of simplified structural blade designs. It supports only a single spar configuration, and all material properties are modeled as isotropic. As such, the module is primarily intended for educational purposes and is not suitable for developing accurate structural designs of modern multi-megawatt (MW) bladesm such as the NREL 5MW design.
Within the QBlade toolchain, QFEM is intended to generate structural blade tables for subsequent use in aeroelastic analyses. It is primarily not intended for calculating blade stresses in reverse from aeroelastic results, even though it allows to import loads from steady BEM turbine analysis – but again for educational purposes only.
For detailed information on the NREL 5MW wind turbine design, please refer to the official NREL documentation, available here:
https://docs.nrel.gov/docs/fy09osti/38060.pdf
Best regards,
David
