Tower (and blades) mode shapes BMODES vs. FAST

Wind & Water Computer-Aided Engineering Software Tools
71

Dear Ali,

Here are my answers to your questions:

  1. A similar question regarding the definition of the cross-sectional inertias (flp_iner, edge_iner) was asked and answered in the following forum topic: BModes flp_iner - #2 by Jason.Jonkman.

  2. The-top mass and inertias refer to the entire rotor-nacelle assembly (RNA) represented as a lumped mass and inertias. These mass and inertias can have a strong impact on the tower mode shapes.

  3. The tower-top (RNA) inertias are defined about the x,y,z axes whose origin is the RNA center of mass.

Best regards,