Analysis of Blade Aeroelastic Instability Characteristics of Floating Wind Turbines under Run-away Situation
Under the action of wind load and wave load,the aeroelastic coupling characteristics of floating offshore wind turbines blades are complex,so it faces a higher risk of aeroelastic instability.Taking the DTU 10 MW reference wind turbine as the research object,we established the aero-hydro-servo-elastic simulation model of the floating offshore wind turbine based on the modified blade element momentum theory,geometrically exact beam model and three-dimensional potential flow theory.What's more,we carried out time-domain simulation and frequency-domain analysis to study the aeroelastic instability characteristics of floating wind turbine blades in the run-away situation.The results show that the blade has aeroelastic instability caused by the coupling of edgewise and torsion.The pitch and heave motions of the floating platform of the floating offshore wind turbines are the main reasons for the lower critical rotational speed of the aeroelastic instability of the blades.The critical rotational speed of the aeroelastic instability of the blade is reduced by 7.90％under the pitch motion and 3.56％under the heave motion.The increase of significant wave height and spectral peak period of waves can reduce the critical rotational speed of blade aeroelastic instability.
万方数据
维普
