Developing an Aeroelastic Stability Process for Large Wind Turbines Using Multibody Simulation

摘要

Future wind turbine designs will likely be stability-driven in contrast to the current loads-driven designs. Design of large wind turbines needs to be verified and approved and eventually modified to have safe aeroelastic stability margins at its operating and idling conditions. For wind turbines with more flexible designs aeroelastic stability analysis needs to be part of the certification. Known rotor related aeroelastic instabilities which can occur for wind turbines are: 1. Rotor blade classical flutter [1], [2]; 2. Rotor whirl flutter [3]; 3. (Aero-) mechanical instabilities; 4. Stall induced instabilities [1], [2]. Stability analyses of wind turbines (WT) with time periodic characteristics currently require software tools dedicated to this specific investigations.