真实山地地形条件下输电塔线体系风致响应数值模拟  

Wind induced response numerical simulation of a transmission tower-line system in real mountainous terrain

作　　者：刘孟龙[1] 吕洪坤 罗坤[1] 汪明军 樊建人[1] 池伟 LIU Menglong;L Hongkun;LUO Kun;WANG Mingjun;FAN Jianren;CHI Wei(College of Energy Engineering,Zhejiang University,Hangzhou 310027,China;State Grid Zhejiang Electric Power Research Institute,Hangzhou 310014,China;E.Energy Technology Co.,Ltd.,Hangzhou 310012,China)

机构地区：[1]浙江大学能源工程学院,杭州310027 [2]国网浙江省电力有限公司电力科学研究院,杭州310014 [3]杭州意能电力技术有限公司,杭州310012

出　　处：《振动与冲击》2020年第24期232-239,共8页Journal of Vibration and Shock

基　　金：国网浙江省电力有限公司科技项目(5211DS17002U)。

摘　　要：以一段位于温州山地的输电线路为背景建立了塔线体系有限元模型,并根据当地高程数据构建了周边山地模型的结构化网格,使用计算流体力学方法研究了当地的风场特征,将风场结果耦合到塔线体系模型上进行了风致响应有限元分析。研究结果表明:在复杂地形影响下,当地风速剖面表现出不同于相关规范中的指数分布特征;塔体两侧导线档距差和所受风荷载差别会直接影响塔体所受顺线向荷载,实际设计中应该减少高风速区域的线路档距和控制输电塔两侧档距差;根据规范参数简化考虑周边复杂地形会影响塔底剪力和塔体顺线向荷载等计算结果,其瞬态分析会高估塔体风振响应,因而工程分析中应重视周边地形的影响。A tower-line system finite element model was established based on a transmission line system located in a mountain in Wenzhou,and the structured grids were generated according to elevation data of surrounding terrain.Computational fluid dynamics(CFD)simulation was carried out on the mountain terrain model to research the features of wind field,then finite element analysis for wind-induced response was carried out with CFD result.The result indicates:wind velocity profile is different from the exponential distribution from Chinese codes due to the effect of complex terrain;the span difference and wind load difference of two sides conductors can directly affect axis force of principle members,so span in high wind speed areas should be reduced and span difference between two sides of transmission towers should be controlled in practical design;computing according to parameter from code can affect the shear of tower’s bottom and load along the line on the tower,and can overestimate the wind fluctuation in transient simulation,so the effect of mountain terrain should be paid more attention to in engineering analysis.

关 键 词：山地地形 计算流体力学(CFD) 有限元分析 输电塔线 风致响应 

分 类 号：TM75[电气工程—电力系统及自动化]