不同节点连接钢管塔杆件微风振动分析  

Aeolian Vibration Analysis of Different Node Connectivity Steel Rod

作　　者：秦力[1] 黄越[1] 丁皓姝[2] 

机构地区：[1]东北电力大学建筑工程学院,吉林吉林132012 [2]东北电力大学能源与动力工程学院,吉林吉林132012

出　　处：《电力学报》2014年第1期87-90,共4页Journal of Electric Power

摘　　要：利用ANSYS软件建立不同长细比(50-250)、不同节点连接(单插板、U型插板、十字插板和法兰)钢管杆件有限元模型,通过模态分析得出杆件一阶自振频率,通过涡激振动公式推倒出其一阶起振临界风速,并与规范给出的参考值进行对比。结果表明,针对大部分钢管杆件,其一阶起振临界风速与规范给出的参考值有较大的差值,工程设计中要考虑适当的折减,以平衡选材的安全性与经济性。ANSYS is applied to establish finite element model of different slenderness ratio （50-250）, differemt node connectivity （single gusset plate, U-shaped gusset plate, cross- gusset and flange）steel rods. Modal analysis is used to obtain its first-order natural frequency. VIV formula is used to obtain the first-order critical wind speed of different slenderness ratio, different rods connectivity steel rods and contrast it with the reference value given by the specification.The results show that there is a great difference between the first-order critical wind speed of most steel rods and the reference value given by the specification. Engineering designs should consider the appropriate reduction to balance the safety and economy of the selection.

关 键 词：输电钢管塔 微风振动 临界风速 长细比 节点连接 

分 类 号：TM753[电气工程—电力系统及自动化]