Abstract:
As wind turbines become larger, the blade size and flexibility increase significantly. During the hoisting process, the blades are subjected to wind loads, leading to aeroelastic coupled vibrations that affect docking precision and installation efficiency. In this research, an aeroelastic coupled dynamic model for the hoisting of a single offshore wind turbine blade is firstly established. Based on the characteristics of the blade hoisting structure, loading, and blade vibratory motion, the main directions of blade vibration are identified. The motion modes of the blade are decoupled, and a simplified dynamic model of the hoisting structure is developed. Subsequently, based on the primary motion characteristics of the hoisted blade, a Single Tuned Mass Damper (Single Tuned Mass Damper, STMD) and Multiple Tuned Mass Damper system (Multiple tuned mass damper system, MTMDs) ) are respectively installed on the blade clamps to suppress the blade vibrations. By using the simplified dynamic model of the hoisted blade, the tuned mass damper (Tuned Mass Damper, TMD) parameters are optimized to minimize the vibratory displacement at the docking point. To verify the feasibility of the proposed method, the vibration suppression effect of the TMD is analyzed under random turbulent wind conditions, considering different turbulence intensities and inflow angles. The results show that TMDs effectively reduce the motion amplitude at the blade docking position under random wind conditions, improving the accuracy and efficiency of the hoisting and docking process. Based on these results, a more engineering-adaptable TMD vibration reduction scheme is proposed.