基于塔-线体系的输电塔覆冰加固有限元分析
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摘要
为了解决输电线路覆冰后输电塔荷载增加引发的倒塔等问题,以国内南方某山区500 kV线路为例,建立了塔-线体系有限元模型,在对塔-线体系进行覆冰有限元分析确定薄弱环节的基础上,有针对性地加固改造并对其进行了抗风能力评估。分析结果表明,在确定输电塔薄弱环节的基础上,采用组合截面构件加固,通过逐次加固的方法有利于有效提高线路覆冰极限,改善其抗风稳定性。
In order to handle tower collapse due to load increase after ice-covering of transmission lines,the 500 kV lines in rural areas in China is taken as an example and finite element model for tower-line system is established.On the basis of ascertaining weak links by finite element analysis of ice-covering on tower-line system,tower-line system is reinforced and evaluated in terms of wind resistance.The analysis result shows that the approach of adopting components reinforcement of compound section and successive reinforcement on the basis of ascertaining weak links of transmission tower can effectively improve ice-covering limit and stability in wind resistance.
In order to handle tower collapse due to load increase after ice-covering of transmission lines,the 500 kV lines in rural areas in China is taken as an example and finite element model for tower-line system is established.On the basis of ascertaining weak links by finite element analysis of ice-covering on tower-line system,tower-line system is reinforced and evaluated in terms of wind resistance.The analysis result shows that the approach of adopting components reinforcement of compound section and successive reinforcement on the basis of ascertaining weak links of transmission tower can effectively improve ice-covering limit and stability in wind resistance.
引文
[1]孟蕾.雨凇雾凇形成机制的观测和冻雨模式初步研究[D].南京:南京信息工程大学,2010。MENG Lei.Observation of Formation Mechanism of Silver Thaw and Rime and Preliminary Study of Ice Rain[D].Nan-jing:Nanjing University of Information Science&Technology,2010.
[2]李庆峰,范峥,吴穹,等.全国输电线路覆冰情况调研及事故分析[J].电网技术,2008,32(9):33-36.LI Qing-feng,FAN Zheng,WU Qiong,et al.Investigation of Ice-covered Transmission Lines and Analysis on Transmis-sion Line Failures Caused by Ice-coating in China[J].Power System Technology,2008,32(9):33-36.
[3]王少华,叶自强.恶劣气候对浙江电网输电线路的影响[J].中国电力,2011,44(2):19-22,57.WANG Shao-hua,YE Zi-qiang.Influence of Atrocious Weather on Transmission Lines of Zhejiang Electric PowerGrid[J].Electric Power,2011,44(2):19-22,57.
[4]金晓华.对覆冰区输电线杆塔加固和设计标准修订的建议[J].南方电网技术,2008,2(2):44-48.JIN Xiao-hua.Suggestions to Reinforce Transmission Line Towers in Ice Area and Revise the Design Standard Criterion[J].Southern Power Syastem Technology,2008,2(2):44-48.
[5]刘纯,陆佳政,陈红冬.湖南500kV输电线路覆冰倒塔原因分析[J].湖南电力,2005,25(5):1-3,11.LIU Chun,LU Jia-zheng,CHEN Hong-dong.Cause Analysis of Tower Falling Down and Ice Accretion in Hunan500kV Power Transmission Line[J].Hunan Electric Power,2005,25(5):1-3,11.
[6]胡大柱,李宏男.格构式输电铁塔组成杆件对极限承载力影响的研究[J].世界地震工程,2004,20(3):50-55.HU Da-zhu,LI Hong-nan.Influence of Components on Ulti-mate Strength in Lattice Transmission Tower[J].World Earthquake Engineering,2004,20(3):50-55.
[7]DL/T5440—2009,重覆冰架空输电线路设计技术规程[S].DL/T5440-2009,Technical Regulation for Deign of OverheadTransmission Lines with Ice-covering[S].
[8]李宏男,白海峰.输电塔线体系的风(雨)致振动响应与稳定性研究[J].土木工程学报,2008,41(11):LI Hong-nan,BAI Hai-feng.Study of Stability and Response to Vibration Caused by Wind(Rain)on Transmission Lines[J].Journal of Civil Engineering,2008,41(11):[9]李庆伟.输电塔-线体系的风致动力稳定性分析[D].大连:大连理工大学,2008.LI Qing-wei.Analysis of Stability of Wind-induced Dynamic on Transmission Tower-line System[D].Dalian:Dalian Uni-versity of Technology,2008.
[10]DL/T5154—2002,架空送电线路杆塔结构设计技术规定[S].DL/T5154-2002,Technical Regulations of Design of Poles and Towers for Power Transmission[S].
[2]李庆峰,范峥,吴穹,等.全国输电线路覆冰情况调研及事故分析[J].电网技术,2008,32(9):33-36.LI Qing-feng,FAN Zheng,WU Qiong,et al.Investigation of Ice-covered Transmission Lines and Analysis on Transmis-sion Line Failures Caused by Ice-coating in China[J].Power System Technology,2008,32(9):33-36.
[3]王少华,叶自强.恶劣气候对浙江电网输电线路的影响[J].中国电力,2011,44(2):19-22,57.WANG Shao-hua,YE Zi-qiang.Influence of Atrocious Weather on Transmission Lines of Zhejiang Electric PowerGrid[J].Electric Power,2011,44(2):19-22,57.
[4]金晓华.对覆冰区输电线杆塔加固和设计标准修订的建议[J].南方电网技术,2008,2(2):44-48.JIN Xiao-hua.Suggestions to Reinforce Transmission Line Towers in Ice Area and Revise the Design Standard Criterion[J].Southern Power Syastem Technology,2008,2(2):44-48.
[5]刘纯,陆佳政,陈红冬.湖南500kV输电线路覆冰倒塔原因分析[J].湖南电力,2005,25(5):1-3,11.LIU Chun,LU Jia-zheng,CHEN Hong-dong.Cause Analysis of Tower Falling Down and Ice Accretion in Hunan500kV Power Transmission Line[J].Hunan Electric Power,2005,25(5):1-3,11.
[6]胡大柱,李宏男.格构式输电铁塔组成杆件对极限承载力影响的研究[J].世界地震工程,2004,20(3):50-55.HU Da-zhu,LI Hong-nan.Influence of Components on Ulti-mate Strength in Lattice Transmission Tower[J].World Earthquake Engineering,2004,20(3):50-55.
[7]DL/T5440—2009,重覆冰架空输电线路设计技术规程[S].DL/T5440-2009,Technical Regulation for Deign of OverheadTransmission Lines with Ice-covering[S].
[8]李宏男,白海峰.输电塔线体系的风(雨)致振动响应与稳定性研究[J].土木工程学报,2008,41(11):LI Hong-nan,BAI Hai-feng.Study of Stability and Response to Vibration Caused by Wind(Rain)on Transmission Lines[J].Journal of Civil Engineering,2008,41(11):[9]李庆伟.输电塔-线体系的风致动力稳定性分析[D].大连:大连理工大学,2008.LI Qing-wei.Analysis of Stability of Wind-induced Dynamic on Transmission Tower-line System[D].Dalian:Dalian Uni-versity of Technology,2008.
[10]DL/T5154—2002,架空送电线路杆塔结构设计技术规定[S].DL/T5154-2002,Technical Regulations of Design of Poles and Towers for Power Transmission[S].
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