不均匀沉降条件下输电塔线体系安全性能研究
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摘要
为准确获知采空区不均匀沉降条件下输电塔线体系的安全性,构建了单塔模型和输电塔线体系的三塔四线模型,基于数值模拟分析方法,研究支座不同位移工况下输电塔或塔线体系的杆件应力、塔体变形、电缆线及相互影响等。分析结果表明单支座沉降会使塔腿应力显著变化,双支座沉降会使得塔体产生明显的倾斜趋势并致使拉紧侧电缆线应力增大。结论指出,在进行采空区输电塔线体系设计,应考虑双支座沉降对电缆线及邻塔的影响。
In order to comprehend accurately the safety of transmission tower line system under the uneven settlement condition in mining area,the single tower and three tower and four line model of the transmission line system had been constructed. Not only the stress and deformation of transmission tower,but also the interaction of adjacent transmission tower and wires are studied based on the numerical simulation analysis method. The analysis results show that settlement of single support will make the stress of tower leg change strikingly,settlement of double supports will make the tower lean obviously and cause the stress of tight side wires increase highly. The conclusion comes out that the influence of settlement of double supports on wires and adjacent towers should be considered in the design of transmission tower line system in mining areas.
In order to comprehend accurately the safety of transmission tower line system under the uneven settlement condition in mining area,the single tower and three tower and four line model of the transmission line system had been constructed. Not only the stress and deformation of transmission tower,but also the interaction of adjacent transmission tower and wires are studied based on the numerical simulation analysis method. The analysis results show that settlement of single support will make the stress of tower leg change strikingly,settlement of double supports will make the tower lean obviously and cause the stress of tight side wires increase highly. The conclusion comes out that the influence of settlement of double supports on wires and adjacent towers should be considered in the design of transmission tower line system in mining areas.
引文
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[3]杨风利,杨靖波,韩军科,等.煤矿采空区基础特高压输电铁塔的承载力计算[J].中国电机工程学报,2009(1),100-106.
[4]110k V~750k V架空输电线路设计规范:GB50545—2010[S].北京:中国计划出版社,2011.
[5]孔贝贝.输电塔及塔线体系的静动力特性分析[D].济南:山东大学,2012.
[6]李勃,张都清,张广成.220kv采空区输电铁塔基础位移塔线耦合有限元分析[C]//第九届电站金属材料学术年会论文集.2011.
[7]袁广林,陈建稳,杨庚宇,等.动态地表变形对输电铁塔内力和变形的影响[J].河海大学学报(自然科学版),2010,38(3):284-289.
[8]林雪松,严波,刘仲全,等.220k V高压输电线路风偏有限元模拟研究[J].应用力学学报,2009,26(1):120-124.
[9]刘小会,严波,林雪松,等.500k V超高压输电线路风偏数值模拟研究[J].工程力学,2009,26(1):244-249.