拼腔组合结构风机塔筒系统气动响应性能分析  

Analysis on Aerodynamic Response Performance for Wind Power Tower System of Multicellular Composite Structures

作　　者：李娜 杨辉[1] 刘飞鹏[1] 李红星[1] 华旭刚[2] Li Na;Yang Hui;Liu Feipeng;Li Hongxing;Hua Xugang(Northwest Electric Power Design Institute Co.,Ltd.,Xi'an 710075,China;College of Civil Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]西北电力设计院有限公司,西安710075 [2]湖南大学土木工程学院,长沙410082

出　　处：《特种结构》2023年第1期8-14,共7页Special Structures

摘　　要：风电资源开发空间的高度及机组容量日益提高,超高塔筒技术得到广泛研究。本文提出一种适用于陆上风电塔筒结构方案的新型拼腔钢-混凝土组合结构风机塔筒,基于风力机系统气动理论,建立了高140m的4.5MW风力机塔筒数值模型,对其在风载下的动力响应进行了数值模拟,并分析了各参数对结构动力特性的影响规律。结果表明:土壤和基础的耦合作用对塔筒系统的频率及模态阻尼比影响较小;风机塔筒的频率、塔顶位移和加速度响应均能满足规范要求;随着风速增大,塔筒顶部位移减小,加速度增大;结构阻尼比对顶部位移的影响较小,而对顶部加速度的影响较明显。研究结果可为塔筒结构风洞试验提供理论依据。As the resource space height and unit capacity of wind power are increasing,ultra-high wind power towers are widely studied.A new steel-concrete multicellular composite structures tower suitable for onshore wind power was proposed.Based on the aerodynamic theory of wind turbine system,the finite-element model of a 4.5 MW wind turbine was investigated.Then the influence rules of each factor to dynamic response of structures was analyzed.The results showed that the coupling effect of soil and foundation has almost no effect on frequency and modal damping ratio of the tower system.The frequency of tower,the displacement and acceleration of tower head can meet specification requirements.With the increase of wind velocity,the displacement of tower top decreased significantly,and the acceleration of tower top increased.The damping ratio of tower structure had little effect on the displacement of tower top,and had significantly effect on the acceleration of tower top.The research provides a theoretical basis for wind-tunnel test of tower structure.

关 键 词：拼腔组合结构 风机塔筒 气动响应 频率 阻尼比 

分 类 号：TU312.1[建筑科学—结构工程] TM614[电气工程—电力系统及自动化]