摘要
针对某110kV线路ZS型铁塔倒塔故障,从现场检查、气象实测数据分析、铁塔杆件取样实验室检测和铁塔安全性校核计算等4个方面综合分析了故障产生原因。结果表明,故障现场最大风速为29m/s,超出了铁塔的设计风速;铁塔折弯部位的角钢尺寸、材质化学成分和力学性能均符合相关标准要求;在设计风速下,发生弯折的塔段主材最大应力值为材料许用应力的96%,抗强风能力最弱。实际风速超过铁塔设计风速是造成此次倒塔故障的主要原因。
Aiming at the collapse case of ZS type tower in 110 kV transmission line,it analyzes a detail causes for the real reasons of the failure such as field investigation,meteorological data analysis,tower sample laboratory test and tower safe calculation/verification. The results show the failure characters： at wind speed of the field is29 m/s,higher than the designed wind speed,the angle size of the tower bends the parts,material chemical composition and mechanical properties from the part of the collapses tower are all in accordance with the related standards; under designed wind speed,the maximum value of stress for the main parts in the bending site is96% of the allowable stress,which is weakest on against the strong wind. It is the principal cause of the collapse for field wind speed to be stronger than the designed wind speed.
作者
张建国
张廼龙
李成钢
Zhang Jianguo;Zhang Nailong;Li Chenggang(Electric Power Research Institute,State Grid Jiangsu Electric Power Co.,Ltd.,Jiangsu Nanjing,211103,China)
出处
《机械设计与制造工程》
2018年第11期101-104,共4页
Machine Design and Manufacturing Engineering
关键词
倒塔
现场检查
实验室检测
设计风速
安全校核
tower collapses
field investigation
laboratory test
designed wind speed
