漂浮特性对风力发电机振动影响

Floating characteristics' impact on vibration of wind turbine

在前期研究工作的基础上,将浮式基础波浪载荷计算和系泊系统计算考虑到所已建立的风力发电机分析模型中,形成漂浮式风力发电机动力学分析模型,进行在风浪下漂浮式风力发电机的动力学分析及振动计算。研究表明:漂浮特性对风力发电机的振动影响很大,同样条件下漂浮式风力发电机振动情况相对固定式风力发电机幅值变化较大(平均值一样),这意味着漂浮式风机的疲劳寿命会有较大下降。因此,针对固定风机的设计方法对漂浮式风机要有所修正及完善。

For analyzing the dynamic characteristics of floating wind turbine system and calculating the wave load on the floating body, the models of sea load and mooring system were established. The dynamic analysis results show that the floating characteristics of platform has great influence on the vibration of wind turbine. Under the same environmental conditions, the vibration amplitude of floating wind turbine fluctuates more seriously than that of fixed wind turbine, despite both have vibrations of the equal mean value, which means the reduction in fatigue life for floating wind turbine. Therefore, the design method for floating wind turbine should be revised and improved.