Large discrepancy of aerodynamic loads between OpenFAST and Simpack

3

Thanks for your advice, @Jason.Jonkman .
I am trying to use Beamdyn. But when I check the input file of Beamdyn, it needs stiffness matrix and mass matrix for several cross-section, right?

I have compared the material file for Beamdyn and Table 2-1 (Distributed Blade Structural Properties) in “Definition of a 5-MW Reference Wind Turbine for Offshore System Development”

  1. For stiffness matrix, (1, 1) and (2, 2) = EAStiff / 10. As mention in this posthttps://forums.nrel.gov/t/creating-beamdyn-blade-input/1325/10?u=ran.tu, (1, 1) (2, 2) might possibly have few influence. So are they defined artificially?

  2. For mass stiffness, I don’t find the value of (6, 6). Table 2-1 seems not to mention this inertia.

Regards,
Ran