考虑叶片旋转效应的风力发电塔架结构风-震耦合响应分析  

RESPONSE ANALYSIS OF WIND TURBINE STRUCTURE CONSIDERING BLADE ROTATION EFFECT UNDER WIND-EARTHQUAKE COUPLING

作　　者：李万润[1,2,3] 范科友 杜永峰[1,2,3] LI Wan-run;FAN Ke-you;DU Yong-feng(Institution of Earthquake Protection and Disaster Mitigation,Lanzhou University of Technology,Lanzhou,Gansu 730050,China;International Research Base on Seismic Mitigation and Isolation of Gansu Province,Lanzhou University of Technology,Lanzhou,Gansu 730050,China;Disaster Prevention and Mitigation Engineering Research Center of Western Civil Engineering,Lanzhou University of Technology,Lanzhou,Gansu 730050,China)

机构地区：[1]兰州理工大学防震减灾研究所,甘肃兰州730050 [2]兰州理工大学甘肃省土木工程减震隔震国际科技合作基地,甘肃兰州730050 [3]兰州理工大学西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050

出　　处：《工程力学》2023年第4期193-204,256,共13页Engineering Mechanics

基　　金：国家自然科学基金项目(51908266,51568041);甘肃省土木工程减震隔震国际科技合作基地定向开放基金项目(GII2018-N04);甘肃省土木建筑学会青年科技托举人才项目;兰州理工大学红柳优秀青年基金项目。

摘　　要：中国风电场大多不可避免的建于地震频发地段,在风荷载作用下风机正常工作时发生地震是一概率极大的事件。因此,该文以西北地区某2.5 MW风力发电机为原型,对考虑叶片旋转效应的风电塔架结构在风-震耦合作用下的响应展开研究。利用谐波叠加法生成考虑叶片与塔筒的空间相干性的模拟脉动风速时程;基于叶素动量理论,计算考虑叶片旋转效应的叶轮载荷,并采用尾流模型计算塔筒尾流区塔筒面的载荷;基于有限元软件ABAQUS建立考虑叶片及机舱偏心的集中质量有限元模型并对风力发电塔筒结构在风-震耦合作用下的响应进行分析;探讨了地震输入时刻对于风-震耦合作用下风电塔筒响应的影响。研究结果表明:叶轮旋转效应及尾流对于风荷载的计算影响较大;风-震耦合作用可能使塔顶位移较风荷载单独作用下的小,基底应力接近地震单独作用下的基底应力值;地震动输入时刻对风-震耦合分析有较大影响,建议在设计时予以考虑。Most wind farms in China are inevitably built in earthquake-prone areas,and thus it is highly possible that earthquake occurs when the wind turbine is working under the wind load.This paper investigated a 2.5 MW wind turbine in Northwest China as a prototype to study the response of a wind turbine tower considering the blade rotation effect under the coupling effect of wind and earthquake.The harmonic superposition method was used to generate a simulated fluctuating wind speed considering the spatial coherence of the blade and the tower.The impeller load considering the blade rotation effect was calculated based on the blade element momentum theory,and the wake model was used to calculate the load on the tower surface in the wake area.A finite element model considering the eccentricity of the blades and the nacelle as a concentrated mass was established through ABAQUS to analyze the response of the wind turbine under wind-earthquake coupling.The influence of the input time of ground motions on the response of wind turbine under wind-earthquake coupling was discussed.The results show that the impeller rotation effect and the wake have significant influence on the calculation of wind load.The wind-earthquake coupling effect may make the top displacement of the wind turbine tower smaller than that under the wind load,and the base stress is close to that under the sole action of earthquake.The input time of ground motion has significant influence on the result when the wind-earthquake coupling is analysed and should be considered in the design.

关 键 词：风电塔筒 风-震耦合 谐波叠加法 叶素动量理论 尾流模型 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程] TU352[建筑科学—结构工程]