摘要
以安徽省六安市某输电塔为例,利用大型有限元软件ABAQUS6.9建立了输电塔架以及输电塔线体系的力学模型。分别对其进行计算分析,得到如下结论:输电塔线体系的振动表现为导地线的弦振动为主,振动时高阶振型均表现为导地线的一次弦振动。导地线振动时其内部产生张力,带动输电塔架的振动,塔架振动产生的位移与导地线的位移叠加,又会引起导地线内部应力的变化;输电塔线体系的覆冰,增大了塔线体系的质量,限制了塔线体系的振动,使得其振动的周期增大,自振频率减小。
It takes a drum tower at Lu＇an of Anhui as an example in this paper .A transmission tower and a transmission tower line system model were established by using the large finite element software ABAQUSS6 .9 .Through calculation and analysis ,the results showed that Vibration of transmission tower line system performance for the string vibration mainly ,the higher modes are string vibration of wires .The tension which produced when the wires vibrates will drive the vibration of transmission tower ,the superposition of transmission tower and wires will again change the internal stress of the wire;The thickness of the ice cover restricts the vibration of tower line system ,which increasing the vibration cycle ,and reducing the natural frequency of vibration .
出处
《皖西学院学报》
2014年第5期67-69,共3页
Journal of West Anhui University
基金
六安市定向委托科学研究项目(2012LW010)
关键词
覆冰
输电塔架
输电塔线体系
自振频率
振动特征
icing
transmission tower
transmission tower line system
natural frequency
vibration
