摘要
基于龙卷风风场的半经验公式模拟龙卷风气旋结构,以典型的5A-ZB3型500 kV输电铁塔为研究对象,计算龙卷风沿平行路径从输电铁塔旁边通过时,输电铁塔上的风载荷,并研究龙卷风载荷作用下铁塔的杆件受力情况。研究结果表明:在龙卷风作用下,铁塔将受到较大的竖直向上的风载荷作用,输电铁塔整体发生弯拉扭组合变形,导致输电铁塔失效的主要形式是扭转变形。
Tornado cyclone structure is simulated based on semi-experience formula of tornado wind filed and taking typical 5A-ZB3 500 kV power transmission tower for a research objective, wind load on the power transmission tower is calculated at the time of tornado passing through the side of power transmission tower along paralleled path, and force conditions of member bars of the tower under tornado wind load are studied as well. Research results indicate the tower will suffer great straight up wind load under the role of tornado and the power transmission tower will happen to combined deformation. It also explains the main kind causing failure of the power transmission tower is torsional deformation.
出处
《广东电力》
2016年第10期102-108,共7页
Guangdong Electric Power
基金
国家自然科学基金资助项目(51608195)
河北省自然科学基金资助项目(E2016502102)
关键词
龙卷风
输电铁塔
风场模拟
强度分析
有限元
tornado
power transmission tower
wind filed simulation
strength analysis
finite element
