Study on Broken Wire Impact and Safety Degree Evaluation

Abstract:

Considering transmission tower-line system coupling vibration ,construct a three dimensional finite element nonlinear analysis model for 500KV Shanghai to Xuzhou transmission line project.Execute Dynamic response analysis of transmission tower-line system under broken wire impact with SAP2000.The results show that :broken wire influence on the reaction of transmission tower-line system displacement and internal force can not be ignored ;influence on the reaction of transmission tower-line system displacement and internal force caused by ground wire broken is less while that of conductor is significant,peak value of a stem internal force can be as much as 2 times initial axial force ;the more wires are broken,the vibration response of transmission tower-line system is greater, the safety degree is lower;when it comes to internal force,there is significant difference between consider broken wire load as impact load and as static load,dynamic effects cannot be ignored.

• Periodical: Applied Mechanics and Materials (Volumes 275-277)
• Pages: 229-237
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.275-277.229
• Online since: January 2013
• Authors: Lin Hui Yang, Rong Xiao, Xian Wu Ji, Hong Nan Li, Tong Sun
• Keywords: Broken Wire, Numerical Simulation, Transmission Tower-Line System Coupling

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