台风过境全过程大型风力机风荷载特性  

Wind loads characteristic of large wind turbine considering typhoon transit process

作　　者：王浩[1] 柯世堂[1] 王同光[1] WANG Hao;KE Shitang;WANG Tongguang(Jiangsu Key Laboratory of Hi-Tech Research for Wind Turbine Design,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学江苏省风力机设计高技术研究重点实验室,南京210016

出　　处：《空气动力学学报》2020年第5期915-923,I0002,共10页Acta Aerodynamica Sinica

基　　金：国家重点研究发展计划(YS2017YFGH001115);国家自然科学基金(51878351,51761165022,U1733129);江苏省优秀青年基金项目(BK20160083);江苏省六大人才高峰高层次人才计划资助项目(JZ-026);江苏省研究生科研与实践创新计划(KYCX18_0244)。

摘　　要：台风结构的复杂性导致当处于不同台风生命周期时风力机的风荷载特性差异巨大,目前针对风力机台风过境全过程风荷载的研究尚属空白。本文在总结国内外台风实测研究成果的基础上,提出了一种针对风力机的台风过境全过程风场模拟方法。以美国可再生能源实验室5MW风力机为例,系统研究了台风过境全过程大型水平轴风力机的风荷载分布特性。结果表明,本文搭建的风力机台风过境全过程风场模拟方法可有效重现台风过境时风力机的全过程风荷载特征。台风眼壁干扰阶段的风力显著大于其它台风过境阶段,需要注意的是,台风眼过后的后眼壁阶段的台风影响仍然十分显著,叶片和塔架的弯矩极值分别达到前眼壁阶段的92.83%和93.97%。此外,研究发现台风外围干扰阶段(前后)和台风眼影响阶段的塔筒底部以纵向弯矩为主,而眼壁干扰阶段存在横风向弯矩占据主导地位的情况,大型风力机抗台风设计的关注点应与正常停机工况区别对待。本文研究结论可为进一步研究大型风力机抗强台风设计提供数据输入和参考依据。The structural complexity of typhoon leads to a huge difference in wind load characteristics of wind turbines when they are in different typhoon life cycles.At present,the research on wind loads for wind turbine typhoon transit process is rare.On the basis of summarizing the research results of typhoon measurement,a new typhoon field simulation method considering the transit process effect was established.The 5 MW wind turbine designed by National Renewable Energy Laboratory was taken as an example,and the wind load distribution characteristics of large horizontal axis wind turbines in the whole process of typhoon transit were studied systematically.The results show that the wind field simulation method or the wind turbine considering typhoon transit process proposed in this paper can effectively simulate the wind loads characteristics of the wind turbine during typhoon transit.The wind force in the typhoon eye wall interference stage is significantly greater than that in other typhoon transit stages.It should be noted that the typhoon effect of the back eye wall stage after the typhoon eye is still very significant,and the extreme values of bending moment of the blade and the tower respectively reach 92.83%and 93.97%of the values during the front eye wall stage.Besides,bending moment at the bottom of tower is dominated by the Myduring the FOVS,TES and BOVS,but the Mxis the dominant bending moment during the FEWS and BEWS.The above conclusions indicate that the focus of large wind turbine anti-typhoon structure design should be treated differently from normal shutdown condition.The conclusions of this paper can provide data input and reference basis for further research on large wind turbine anti-typhoon design.

关 键 词：大型风力机 台风风场 过境全过程分析 风荷载特性 数值模拟 

分 类 号：TU352.2[建筑科学—结构工程]