摘要
为了研究500 kV输电钢管塔的动力特性,比较了有预应力和无预应力下输电塔局部模态的异同,分析了调整隔面间距以及斜材长细比对输电塔动力特性的影响。结果表明:实际工程中,预应力对于输电塔局部模态的作用无显著效果;调整隔面间距以及斜材长细比对于输电塔的整体模态无显著影响,而对于输电塔局部模态有较大影响。
In order to study the dynamic behavior of 500 kV transmission tubular tower,the local modes of transmission tower with prestress or no prestress are compared,and the influence of the distance of face spacing and the slenderness ratios of cross members on the dynamic behavior is analyzed.Results show that prestress has no significant effect on the local modes of transmission tower in engineering practice.The adjustment of the distance of face spacing and the limit of member slenderness ratios have no significant influence on the overall modes of transmission tower,but have a great influence on the local modes.
出处
《江西科学》
2012年第1期71-74,共4页
Jiangxi Science
关键词
输电塔
动力特性
自振周期
局部模态
预应力
Transmission tubular tower
Dynamic behavior
Natural frequency
Local mode
Prestress
