Commits on Oct 6, 2023

1. Resolve BeamDyn initial strain for rotated blade …

   In the BeamDyn driver, and likely in the glue-code, if the blade was
   initially rotated then an initial strain was introduced which produced
   forces when no loads or gravity had been applied. The cause was
   traced to the calculation of R0 (initial rotation) at the quadrature
   points which was interpolated via the shape functions from the
   element nodal rotations. The shape function interpolation is not
   exact and introduced strains on the order of 1e-7, but with the large
   stiffness of the blade, forces of 6200 N could be produced at the root
   for the IEA 15MW blade. This was resolved by directly calculating
   the quadrature point initial rotations in uu0(4:6) via interpolated
   tangent and twist, which are well behaved. This was only a problem for
   non-straight blades such as the IEA 15MW.
   
   This commit also fixes a bug where the parameter UsePitchAct
   wasn't initialized from the input file until after it was used in
   SetOutParam. The initialization has been moved to SetParameters.

   

   deslaughter committed Oct 6, 2023
   Configuration menu

   • View commit details
   • Copy full SHA for ab42564
   • Browse repository at this point

   Copy the full SHA

   ab42564 View commit details

   Browse the repository at this point in the history

2. Updated reg test for b/BeamDynInitialStrain branch

   

   deslaughter committed Oct 6, 2023
   Configuration menu

   • View commit details
   • Copy full SHA for 91318e9
   • Browse repository at this point

   Copy the full SHA

   91318e9 View commit details

   Browse the repository at this point in the history