J4  2011, Vol. 45 Issue (4): 678-683    DOI: 10.3785/j.issn.1008-973X.2011.04.015
 土木工程、建筑工程

1.浙江大学 土木工程学系,浙江 杭州 310058； 2浙江大学宁波理工学院 土木建筑工程分院,浙江 宁波 315100；
3.浙江省电力设计院,浙江 杭州 310007
Broken wire analysis and broken wire load calculation of
high voltage transmission tower
SHEN Guo-hui1, SUN Bing-nan1,2, YE Yin3, LOU Wen-juan1
1. Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China; 2. School of Civil Engineering
and Architeture, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China;
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Abstract:

The finite element method (FEM) was employed to solve the broken wire problem of high voltage transmission tower. The finite element model including transmission tower, transmission line and the ground was conducted. The method using the death of cable element was used to simulate the sudden breaking of transmission line. The friction and contact were considered to simulate the interaction between the dropping wire and the ground. Then the responses of transmission towerline system due to wire breakage were obtained and the broken wire loads were calculated. These broken wire loads were compared with the loads calculated from the codes and literatures. When the sway amplitude of insulator adjacent to the broken span reaches maximum, the responses of transmission line such as the axial force of insulator and along-line shear force of tower will reach their maximal values at the same time. If the static effect is considered, the broken wire loads obtained from codes are larger than the loads from FEM and the broken wire loads calculated based on the curve method and FEM are very close. If the dynamic impact effect is considered, the broken wire loads from codes and the curve method are much smaller than those from FEM.

 : TU 312.1