针对风力发电机组钢制高塔的涡激振动问题,采用固体-流体相结合的仿真方法对停机状态的塔架一阶涡激振动特性进行研究。首先以某2.5 MW、140 m高塔机组为研究对象,建立塔架-叶片耦合结构仿真模型,利用模态和CFD仿真分析塔架一阶涡激振动的共振频率和共振风速范围,表明该风电机组塔架存在发生一阶涡激振动的风险;然后提出一种基于固体-流体迭代快速仿真一阶涡激振动最大位移计算方法,考虑叶片对塔架涡激振动的耦合作用,得到最大振动位移。现场测试表明实测最大一阶涡激振动位移与仿真结果基本相符,验证了该仿真方法的准确性。
Abstract
Aiming at the problem of the first-order vortex induced vibration of the steel tower of the wind turbine generator system（WTGS）, the first-order vortex induced vibration characteristics of the whole WTGS are studied by using the simulation method of solid fluid combination. Firstly, taking a 2.5 MW and 140 m tower unit as the research object,a tower-blade coupling simulation structure model is established. The resonance frequency and resonance wind speed range of the first-order vortex induced vibration of the whole WTGS are analyzed by modal and CFD simulation, which shows that the wind turbine tower has the risk of first-order vortex induced vibration. Then, a fast simulation method based on solid fluid iteration is proposed to calculate the first-order vortex induced vibration displacement. Considering the coupling effect of the blades on the vortex-induced vibration of the tower, the maximum vibration displacement is obtained. Field tests show that the measured maximum first- order vortex-induced vibration displacement is basically consistent with the simulation results, which verifies the accuracy of the simulation method.
关键词
风电机组 /
涡激振动 /
最大位移 /
固体-流体迭代 /
现场测试
Key words
wind turbine generator /
vortex induced vibration /
maximum displacement /
solid fluid iteration /
field test
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基金
国家自然科学基金（U22A20178）; 国家重点研发计划（2019YFE0192600）; 浙江省基础公益研究计划（LHZ21E090004）
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