特高压输电塔龙卷风荷载特性的数值模拟  

Numerical Study of Ultra-High Voltage Transmission Tower Wind Loads Characteristics Against Tornado

作　　者：张顺 王振国 姜文东 徐枫 段忠东 ZHANG Shun;WANG Zhenguo;JIANG Wendong;XU Feng;DUAN Zhongdong(School of Civil and Environmental Engineering,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China;Research Institute of State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310014,China;State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310007,China)

机构地区：[1]哈尔滨工业大学(深圳)土木与环境工程学院,广东深圳518055 [2]国网浙江省电力有限公司电力科学研究院,浙江杭州310014 [3]国网浙江省电力有限公司,浙江杭州310007

出　　处：《中国电力》2023年第10期153-163,共11页Electric Power

基　　金：国网浙江省电力有限公司科技项目(5211DS220006)。

摘　　要：采用计算流体动力学(computational fluid dynamics,CFD)数值模拟方法研究了龙卷风作用下特高压输电塔的风荷载特性。通过建立龙卷风风场的CFD数值模型,验证了龙卷风风场结构的合理性。进一步建立特高压输电塔的精细化数值模型,重点分析了风场中不同位置和不同风向角下输电塔各塔段的体型系数。研究结果表明:输电塔上部第1~4塔段在距离龙卷风风场中心1.5D(D为核心半径)处所受风荷载最大,下部第5~9塔段在距离龙卷风风场中心1.0D处所受风荷载最大;输电塔整体在距离龙卷风风场中心1.0D处所受风荷载最大。随着与龙卷风中心距离的增大,输电塔整塔横向风载系数最不利风向角从60°增大至90°,纵向风载体型系数最不利风向角在0°~30°范围内变化。在距离风场中心1.0D和1.5D处,输电塔整塔风载体型系数模拟值要大于规范值。In this paper,the wind load characteristics of the Ultra-High Voltage transmission tower under tornado are studied based on the CFD(computational fluid dynamics)numerical simulation method.The numerical model of a full-scale tornado is established.The measured radar data of Spencer tornado as the velocity inlet are adopted to generate the tornado-like wind field,and the impacts of the surface roughness are considered.The tangential velocity and core radius at different heights are obtained,then contrasted with the measured data to verify the rationality of the tornado-like vortex structure.Next,the overall refined CFD numerical modeling of the transmission tower is established,then the SST k-ωturbulence model based on RANS is used to simulate the flow around the transmission tower under tornado.The effects of the different locations and wind directions on the shape coefficients of each section of the transmission tower are studied.It is found that the wind loads of the top section 1 to section 4 of the transmission tower would take the maximum when the tower is located at the wind field of 1.5D(D is the core radius),and the wind loads of the bottom section 5 to section 9 of the transmission tower are the maximum when the tower is located at the wind field of 1.0D.The wind loads of transmission tower reach the maximum when the tower is located at the wind field of 1.0D.The worst wind attack angle of the transverse directions of the transmission tower increases from 60°to 90°,and the worst wind attack angle of the longitudinal directions of the transmission tower varies in the range of 0°to 30°as the distance from the center of tornado increases.The simulated wind load shape coefficient of the transmission tower at the locations of 1.0D and 1.5D are larger than the code values,and all sections(except for the section 7,8 and 9 at the location of 1.5D)are also larger than the code values.

关 键 词：龙卷风 输电塔 地表粗糙 风荷载 CFD数值模拟 

分 类 号：TM75[电气工程—电力系统及自动化]