针对现有风电机组涡激振动研究侧重于无顶部质量刚塔的一阶涡激振动,忽视有顶部质量高柔塔的二阶涡激振动的不足,开展高柔塔二阶涡激振动特性研究。首先,基于GH Bladed软件建立高柔塔风电机组模型,并通过模态分析得到高柔塔二阶固有频率及模态振型;然后,基于涡激振动相关标准,计算二阶涡激振动作用时各高度处的惯性力;最后,以某型2 MW高柔塔风电机组为研究对象,进行二阶涡激振动特性分析,并与一阶涡激振动特性进行对比。结果表明,高柔塔一阶涡激振动造成的影响较小,可忽略不计;二阶涡激振动易导致塔筒强度不足,存在较大的倒塔风险。
Abstract
The existing wind turbine vortex-vibration researohes usually focus on the first-order vortex-induced vibration of the rigid tower regardless of the top mass instead of ignoring. The second-order vortex-induced vibration of the high-flexible tower with top mass is neglected. This study mainly concentrates on the second-order vortex-induced vibration characteristics of wind turbine high flexible towers. Firstly, the wind turbine model containing a high-flexible tower is established using GH Bladed software. The natural frequencies and vibration modes of the high-flexible tower are obtained through modal analysis. Then, the inertial force at each height under the altion of the second-order vortex-induced vibration is calculated according to the relevant standards. Finally, taking 2 MW high-flexible tower wind turbine as the reasearch object, the second-order vortex-induced vibration characteristics are analyzed and compared with the counterpart in the fundamental vortex-induced pattern. The results reveal that the influence of the first-order vortex-induced vibration the tower strength can be ignored. However, the second-order vortex-induced vibration may easily lead to insufficient tower strength, which is a potential risk of tower collapse.
关键词
风电机组 /
塔筒 /
疲劳损伤 /
涡激振动 /
极限强度
Key words
wind turbines /
towers /
fatigue damage /
vortex-induced vibration /
ultimate strength
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基金
国家重点研发计划（2019YFE0104800）
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