中北大学学报（自然科学版）2018，Vol.39Issue(5)：503-507,514,6.DOI:10.3969/j.issn.1673-3193.2018.05.004
沿海地区避雷塔静动特性与稳定性分析
Study on Static/Dynamic Characteristics and Wind-Resistant Stability of Lightning Tower in Coastal Area
周吉 1石端伟1
作者信息
- 1. 武汉大学 动力与机械学院,湖北 武汉 430072
- 折叠
摘要
Abstract
Aiming at the tower-collapsing accidents caused by typhoon in coastal areas,the static and dy-namic characteristics and wind-resistant stability of a 42-meter-high lightning tower and 42-meter-high cable stayed lightning tower were analyzed by means of finite element method.Modal analysis was per-formed on the lightning tower and the wind loads of the tower were calculated.Using APDL programs, the wind loads were applied to all structure components;the calculation results show that the maximum stress of the cable stayed lightning tower decreases by 6 3 .1 % than the lightning tower and the strength of the structures can meet the requirements.AR model has been used to simulate fluctuating wind.The results of fluctuating wind response show that the maximum displacements of the improved structure are 3.9%~5.6% of the lightning tower,and adding wire ropes effectively reduce the amplitude of the vi-bration.Besides,using the nonlinear buckling analysis method,buckling analysis is conducted and it show that the buckling critical wind speed of the lightning tower and the cable stayed lightning tower is 42.5 m/s and 76.25 m/s respectively.The former is 79.5% higher than the latter.The results indicate that the stability of cable stayed lightning tower can meet the requirements.关键词
避雷塔/强度/脉动风/稳定性/有限元Key words
lightning tower/strength/fluctuating wind/stability/finite element分类
机械制造引用本文复制引用
周吉,石端伟..沿海地区避雷塔静动特性与稳定性分析[J].中北大学学报（自然科学版）,2018,39(5):503-507,514,6.
