导线对输电塔动力特性的影响  

Influence of Conductors on Dynamic Characteristics of Transmission Tower

作　　者：袁哲峰[1] 程浩[2] YUAN Zhe-feng CHENG Hao(School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070 ,China Central Southern China Electric Power Design Institute Co, Ltd, Wuhan 430071, China)

机构地区：[1]武汉理工大学土木工程与建筑学院,武汉430070 [2]中国电力工程顾问集团中南电力设计院有限公司,武汉430071

出　　处：《建材世界》2017年第3期73-77,共5页The World of Building Materials

摘　　要：随着电力系统的不断升级,输电线路的跨度越来越大,这使得导线所占输电塔-线体系的比重越来越大,导线对输电塔动力特性的影响便越来越不容忽视,这会对输电塔在地震作用下或者风荷载作用下的动力响应造成影响。为了研究导线对输电塔动力特性的影响,基于通用有限元软件ANSYS,建立了输电单塔和塔线体系的空间精细化模型;通过对比两种模型的振型和自振频率,来研究导线的存在对输电塔的动力特性的影响。另外,通过改变塔线体系中导线的水平档距,来研究不同的水平档距下,导线对输电塔动力特性的影响。结果表明,由于导线的存在,输电塔的自振频率会明显降低;且导线的水平档距越大,这种现象会越发明显。With the upgrading of the electric power system,the span of transmission lines is becoming larger and larger, which leads to the increasing proportion of the wires. The influence of the conductors on the dynamic characteristics of the transmission tower can not be ignored, which will affect the dynamic response of the transmission tower under the action of earthquake or wind load. In order to study the influence, the fine models of transmission tower and transmission line system were established based on the general finite element software ANSYS. By comparing the vi- bration modes and natural frequencies of the two models, the influence of the conductors on the dynamic characteristics of the transmission tower was studied. In addition, through changing the horizontal span of the transmission line system, the relationship between the span and the dynamic characteristics of the tower was researched. The results showed that the transmission tower vibration frequency will be significantly reduced due to the existence of the conductors, and the horizontal span of the transmission lines is bigger,this phenomenon is more obvious.

关 键 词：输电塔 导线 水平档距 动力特性 

分 类 号：TM75[电气工程—电力系统及自动化]