大兆瓦级钢混塔筒结构载荷及受力特性研究  

Study on Load and Stress Characteristics of Large Wind Turbine Steel-Concrete Tower Structure

作　　者：李彦娥 周扬 郭松龄 李强 曹海 Li Yan'e;Zhou Yang;Guo Songlin;Li Qiang;Cao Hai(CSIC Haizhuang Windpower Co.,Ltd.,Chongqing 401120,China)

机构地区：[1]中船海装风电有限公司,重庆401120

出　　处：《特种结构》2024年第4期50-56,93,共8页Special Structures

摘　　要：机组大型化致使塔顶气动推力和俯仰弯矩增加,塔底弯矩载荷大幅度增加,钢混支撑结构逐步成为风电机组大型化发展的有效解决方案。本文基于陆上大容量风机钢混塔筒结构,研究混塔段和钢塔段比例对塔筒载荷和受力分布的影响。结果表明:对于大兆瓦高塔筒风电机组,由于其塔身弯矩较大,截面抗弯模量较高,整机频率邻近3P频率范围;随着混塔段比例增大,塔筒各截面极端载荷和疲劳载荷增大,但轮毂处运动响应减小,结构稳定性增加;不同比例塔筒结构极端荷载作用下同一高度处截面刚度和载荷均较大,混凝土拉压应力减小,载荷影响占比小于结构刚度。钢混塔筒结构设计应同时考虑载荷和结构强度,优化整体结构。The upsizing of the wind turbine results in increased aerodynamic thrust and pitching moment at the top of the tower,as well as a significant increase in bending moment at the base of the tower.Steel-concrete support structure becomes an effective solution for the large-scale of wind turbines.Based on the steel-concrete tower structure of a large capacity onshore wind turbine,the influence of the proportion of the concrete tower section to the steel tower section on the load and stress distribution was investigated.The results show that for large megawatt tall tower wind turbine,due to its larger tower bending moment and higher section bending modulus,the frequency is close to 3P frequency range.As the proportion of concrete tower sections increases,the extreme load and fatigue load of each section of the tower increase,but the dynamic response at the hub decreases and the structural stability increases.Under the extreme loads of tower structures with different proportions,both the section stiffness and load at the same height become larger.The tensile and compressive stress of concrete decreases,and the proportion of load impact is smaller than that of structural stiffness.It concludes that both load and structural strength should be considered during design to optimize the overall structure.

关 键 词：钢混支撑结构 大容量风机 整机频率 结构强度 

分 类 号：TU312.1[建筑科学—结构工程]