Analysis of Structural Vibration Characteristics of Offshore Wind Turbines during Emergency Shutdown
Emergency shutdown of offshore wind turbines(OWT)is an important measure to ensure the safe operation of wind turbines.In the event of emergencies such as excessive wind speed or power grid anomalies,it is necessary to perform an emergency shutdown of wind turbines to ensure the safety of the turbines and surrounding facilities.During the emergency shutdown process,the loads on the wind turbine structure undergo rapid changes.The combined effects of the blade pitching speed and the wind speed during shutdown can result in excessive vibrations that can affect the structural safety of the wind turbine.Therefore,it is crucial to thoroughly investigate the dynamic response characteristics of wind turbine structures during emergency shutdown.A normal wind profile model is used to simulate the wind field environment at different wind speeds.Based on the DTU 10 MW wind turbine model,the OpenFAST software is used to simulate the dynamic response of the OWT structures during emergency shutdown.The motion response of the OWT structure at different wind speeds and pitch speeds is calculated and its variations are summarized.In addition,the MLIFE software is used to analyze the fatigue damage at the base of the turbine tower under different operating conditions.The results provide important guidance for the design and operation of future large-scale OWTs.
万方数据
维普
