风力发电机的一致概率风-地震作用组合方法  

Uniform-Probability Wind-Seismic Load Combination Method of Wind Turbines

作　　者：席仁强[1] 蒋学东[1] 何云松[1] 班书昊[1] XI Renqiang;JIANG Xuedong;HE Yunsong;BAN Shuhao(School of Mechanical Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州大学机械工程学院,江苏常州210416

出　　处：《常州大学学报（自然科学版）》2020年第6期83-90,共8页Journal of Changzhou University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51808061)。

摘　　要：针对高地震危险性区域的风电场,提出一致概率风-地震作用组合方法。采用Weibull分布描述轮毂高度处平均风速随机特征;通过地震危险性分析,确定地震动参数;假定风、地震为独立事件,建立二者联合概率模型。随后,以NREL 5 MW风力发电机为例,基于一致概率风-地震作用组合,分析结构动力响应。结果表明:风-强震激励下,地震动控制结构响应;风-弱震作用下,风-地震共同控制结构响应;一致概率风-地震作用下,结构动力响应特征与地震动特性有关。A uniform-probability wind-seismic combination method is established for the wind farms in the high seismic-hazard region.Weibull distribution is selected to describe the stochastic behavior of the mean wind speed at hub-height in this study.Based on the seismic hazard analysis,probabilistic model of ground motion is established.Assuming that winds and seismic,are independent events,a joint probabilistic model of wind and seismic is set up.Taking the NREL 5 MW wind turbine for example,dynamic response is analyzed based on this wind-seismic combination model.The result shows that under the excitation of wind and strong seismic combination,dynamic response of wind turbines is dominated by seismic wave while it is regulated by wind and seismic jointly under excitation of wind and weak earthquake.The dynamic behavior of wind turbine is connected with the characteristics of seismic wave under the excitation of uniform-probability wind seismic combination.

关 键 词：风力发电机 地震危险性分析 一致概率风-地震组合 结构动力响应 输入地震动方向 

分 类 号：TK89[动力工程及工程热物理—流体机械及工程]