Long-term vibration-based monitoring and seismic performance assessment of a wind turbine
Long-term vibration-based monitoring and seismic performance assessment of a wind turbine
复制标题
风力涡轮机的长期振动监测和抗震性能评估
DOI：
10.1007/s13349-020-00442-z
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发表时间：
2020
影响因子：
4.4
通讯作者：
Ozgun Ergun
中科院分区：
文献类型：
--
作者：
S. Soyoz;Serap Hanbay;Burak Bagirgan;Ozgun Ergun
在这项研究中，介绍了900kw陆上风力发电机的长期振动监测。模态特性如频率、形状和阻尼比使用增强的频域分解方法。确定了模态参数随环境和运行条件的变化。通过多元线性回归分析，得到了去除这些影响后的模态参数。然后，建立了包括桩和土弹簧在内的风力机有限元模型；并使用已识别的模态参数进行更新。最后给出了考虑不同风速下极限状态为局部屈曲的结构地震易损性曲线。采用非线性有限元模型对涡轮进行推覆分析，确定了发生局部屈曲的应力水平。在本研究的背景下，观察到识别的模态值具有显著的散射，风速水平显著改变了风力机的地震易损性曲线。
In this study, long-term vibration-based monitoring of a 900-kW onshore wind turbine is presented. Modal properties such as frequency, shape, and damping ratios were obtained using enhanced frequency domain decomposition method. Change in modal parameters due to environmental and operational conditions was determined. Modal parameters after cleansing such effects were obtained by multiple linear regression analyses. Then, finite element model of the wind turbine was developed including piles and soil springs; and updated using identified modal parameters. After all, seismic fragility curves of the structure with the limit state being local buckling were developed considering different levels of wind speed. Stress level at which local buckling occurs was determined by pushover analysis of the turbine using a nonlinear finite element model. In the context of this study, it was observed that identified modal values had significant scattering and level of wind speed significantly changed the seismic fragility curve of the wind turbine.