Dynamic behaviors of wind turbines under wind and earthquake excitations
Dynamic behaviors of wind turbines under wind and earthquake excitations
复制标题
风力发电机在风和地震激励下的动态行为
DOI：
10.1063/5.0054746
复制
发表时间：
2021-08
影响因子：
2.5
通讯作者：
Xu Chengshun
中科院分区：
文献类型：
--
作者：
Xi Renqiang;Wang Piguang;Du Xiuli;Xu Chengshun
研究了风力发电机在风震联合载荷作用下的动态行为。在评估了风随机性的影响后，进行了数值模拟，以检验风速和地震烈度对风力发电机动态行为的影响。随后，评估地震起始时间和输入角度对风力机地震响应的影响，探讨风荷载和地震荷载的时空组合。值得注意的是，在弱地震激励和强地震激励下，风分别增大和减小风力涡轮机的响应幅度。因此，最不利的地震荷载条件在前一种情况下由风-地震组合代表，而在后一种情况下仅由地震情况代表。由于地震的起始时间会显着影响风力发电机的动态响应，因此必须生成足够的风样本以获得响应幅度的平均值。此外，由于气动阻尼和叶片刚度的不对称性，地震的输入角会影响风力涡轮机的地震响应。因此，必须谨慎考虑空间域中风和地震激励的组合。
The dynamic behaviors of wind turbines subjected to combined wind-earthquake loading were investigated. Numerical simulations were performed to examine the influence of wind speed and earthquake intensity on the dynamic behaviors of wind turbines after evaluating the influence of randomness of wind. Subsequently, the effect of start time and input angle of earthquakes on seismic responses of wind turbines was evaluated to explore the temporal and spatial combinations of wind and earthquake loads. It is noted that the wind increases and decreases the response amplitude of the wind turbine under weak and strong earthquake excitations, respectively. Consequently, the most unfavorable seismic load conditions are represented by the wind–earthquake combination in the former scenario and by only the earthquake case in the latter scenario. Because the start time of earthquakes can significantly affect the dynamic response of the wind turbine, sufficient wind samples must be generated to obtain the mean of the response amplitudes. Moreover, the input angle of earthquakes influences the seismic response of wind turbines, owing to the asymmetry of aerodynamic damping and blade stiffness. Consequently, the combination of wind and earthquake excitations in the space domain must be considered prudently.
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