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Problem with mass
Hello,
I have a problem with mass of blade. Im using a sample project of 5MW turbine which is in qblade’s files. In QFEM blade mass is 158205 kg, but when i export data and add up mass of all blade elements, then total mass is 49152,45 kg. I don’t how it is even possible. Meybe I’m doing something wrong. Please, help me with this.
Best regards
WT
Hi,
when you are using QFEM for a structural blade design, it’s important to note that it is not in any way related to the structural files that were used in setting up the NREL 5MW turbine definition. Any new structural blade design created in QFEM will likely differ significantly from the official NREL 5MW structural blade design used in the sample project that you mention.
Typically specialized software is used for this such as BECAS, VABS or NuMAD. QFEM is only a simplified (educational) tool, with limitations on the design space for the internal blade structure. It only considers isotropic material properties, which may further restrict the design possibilities.
BR,
David
