广东电力2016，Vol.29Issue(1)：124-130,7.DOI:10.3969/j.issn.1007-290X.2016.01.024
国内外导线张力设计方法的差异
Differences of Design Methods for Domestic and Overseas Conductor Tension
朱映洁 1林方新1
作者信息
- 1. 中国能源建设集团广东省电力设计研究院有限公司，广东 广州 510663
- 折叠
摘要
Abstract
Influence of natural wind fluctuation is not considered for calculating conductor tension in design specifications on power transmission line in China,thereby,large safety factor is used to resist overload caused by peak value of wind speed fluctuation.While in foreign standard,ultimate tension design method fully considering influence of natural wind fluctuation is used to calculate conductor tension,thus small safety factor is adopted to make allowed maximum working strength close to critical value of plastic deformation.Above circumstances are main reasons for causing large differences between calculated values of conductor tension in domestic and overseas,as well as design methods for design system of power transmission line in China and foreign standard ultimate tension.Example calculation is used for analyzing influences on design for steel tower by using these two different methods and results indicate that with increase of ruling span,rising slope of tension under ex-treme wind condition calculated according to foreign standard is obviously larger than that according to domestic standard. On the premise of taking yearly average working condition as the controlling working condition,ultimate tension design method will not cause difference of conductor sag and tension support tower designed based on ultimate tension design meth-od can bear greater whole-phase imbalance tension.关键词
极限张力设计法/自然风脉动/风振系数/单位长度风荷载/不平衡张力Key words
ultimate tension design method/natural wind fluctuation/wind vibration factor/per unit length of wind load/imbalance tension分类
信息技术与安全科学引用本文复制引用
朱映洁,林方新..国内外导线张力设计方法的差异[J].广东电力,2016,29(1):124-130,7.
