新型铰接式海上风力机动力响应分析

Dynamic response analysis of the new articulated offshore wind turbine

文章针对75 m水深,开发了一种新型铰接式基础海上风力机,考虑到风浪流的联合作用,分析了其在发电海况和极限海况下的动力响应。基于叶素动量理论计算了风力机叶片气动载荷;基于经验公式计算了塔架风压载荷;基于三维势流理论计算了铰接式基础的水动力特性;考虑基础运动及波高引起的瞬时湿表面的变化及铰接点的结构阻尼,同时考虑海流力,编写程序计算风力机的时域动力响应特性。计算结果表明,铰接式海上风力机具有良好的运动性能,满足发电海况下正常发电的需求以及极限海况下结构自存的安全要求。

In this paper,a new type of the articulated offshore wind turbine is developed for the water depth of 75 m.The dynamic response of working sea conditions and extreme sea conditions is analyzed considering the combination of wind,wave and current.The aerodynamic load of the wind turbine is calculated based on the blade element momentum theory,and the wind pressure load of the tower is calculated based on the empirical formula.The hydrodynamic performance is analyzed through the 3-D potential flow theory.The in-house program is programmed to calculate the time domain dynamic response characteristics of the wind turbine,considering the changes of the structural damping of the articulated point and the instantaneous wet surface caused by the articulated foundation motion and wave height.The results show that the articulated offshore wind turbines have good motion performance,meeting the requirements of normal power generation under working sea conditions and the safety requirements of structural self-survival under extreme sea conditions.