论文部分内容阅读
本文利用单向流固耦合方法(One-wayuid-structure interaction,FSI)和规范方法计算龙卷风作用于输电塔结构的荷栽,并分析比较结构响应。FSI方法直接在足尺龙卷风风场中建立输电塔结构的刚性模型,通过CFD(Computationaluid dynamics)计算得到结构表面受到的龙卷风风压,并将结构表面受到的风压转化为输电塔梁单元模型的节点集中力,进行有限元分析。本文还将FSI方法和利用规范中的风荷栽公式计算并施加龙卷风荷载的分析结果进行对比。最后改变龙卷风的袭击角度,分别在0°、45。和90。工况下以FSI方法和规范方法进行结构响应的参数化分析。FSI方法计算的结构最大轴向力响应小于规范方法,且误差不大于20%。
In this paper, one-way fluid-structure interaction (FSI) and standard method are used to calculate the load of tornado acting on the transmission tower structure, and the structural response is analyzed and compared. FSI method was used to establish the rigid model of transmission tower directly in the full-scale tornado wind field. The tornado wind pressure on the structure surface was calculated by Computational Fluid Dynamics (CFD), and the wind pressure on the structure surface was transformed into the transmission tower element model Nodes focus on the finite element analysis. This paper also compares the FSI method with the analysis of wind load equations using the wind load formula and applying the tornado load analysis. Finally change the attack angle of the tornado, respectively, at 0 °, 45. And 90. Parametric analysis of structural response using FSI method and canonical method under operating conditions. The maximum axial force response calculated by FSI method is less than the standard method, and the error is not more than 20%.