1000kV汉江大跨越塔线体系风洞实验与风振响应分析
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摘要
以建设中的晋东南—南阳—荆门1000kV特高压输电线路为工程背景,针对输电铁塔风致响应较复杂的特点,进行了气弹模型风洞实验。输电塔气弹模型采用刚性节段加"V"型弹簧片法设计,通过分析实验结果,获得了铁塔的气动力系数和风振响应等数据。在单维多变量随机风场合成方法的基础上,引入了纵向与竖向脉动风速的交叉谱的影响,模拟了三维脉动风速时程。采用抖振响应的时程方法,分析了输电塔线体系的顺风向风振响应,其计算值与实验值吻合较好。结果表明,在风荷载作用下,输电导线与铁塔的相互耦合作用不可忽略。
Taking the 1 000 kV UHV transmission project from Jindongnan through Nanyang to Jingmen being constructed as research background, according to the feature that the wind-induced response of transmission tower is complicated, the wind tunnel tests for aeroelastic model were performed. The aeroelastic model of the tower is designed by use of rigid subsections with "V" shaped spring added. Through the analysis on experimental results, the data of aerodynamic coefficient and wind-induced response of the transmission tower is obtained. Based on the one variable multi-dimension spectral representation method, the cross-spectrum of the vertical wind and the portrait wind has been considered. The time-history method of the buffeting response is used for the wind-induced analysis of the transmission line system, the results and the test values are in good agreement. Research results show that under the wind load the coupled vibration of conductors and transmission tower should not be neglected.
Taking the 1 000 kV UHV transmission project from Jindongnan through Nanyang to Jingmen being constructed as research background, according to the feature that the wind-induced response of transmission tower is complicated, the wind tunnel tests for aeroelastic model were performed. The aeroelastic model of the tower is designed by use of rigid subsections with "V" shaped spring added. Through the analysis on experimental results, the data of aerodynamic coefficient and wind-induced response of the transmission tower is obtained. Based on the one variable multi-dimension spectral representation method, the cross-spectrum of the vertical wind and the portrait wind has been considered. The time-history method of the buffeting response is used for the wind-induced analysis of the transmission line system, the results and the test values are in good agreement. Research results show that under the wind load the coupled vibration of conductors and transmission tower should not be neglected.
引文
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[20]李宏男,任月明,白海峰.输电塔体系风雨激励的动力分析模型[J].中国电机工程学报,2007,27(30):43-48.Li Hongnan,Ren Yueming,Bai Haifeng.Rain-wind-induced dynamic model for transmission tower system[J].Proceedings of the CSEE,2007,27(30):43-48(in Chinese).
[21]Ronaldo C B,Rosangela S R,Michele S P,et al.Dynamic behavior and stability of transimission line towers under wind forces[J].Journal of Wind Engineering and Industrial Aerodynamics,2003,91(8):1051-1067.
[22]邓洪洲,朱松晔,王肇民.大跨越输电塔线体系动力特性及风振响应[J].建筑结构,2004,34(7):25-28.Deng Hongzhou,Zhu Songye,Wang Zhaomin,Study on dynamic behavior and wind-induced vibration response of long spans transmission line system[J].Building Structure,2004,34(7):25-28(in Chinese).
[2]肖正直.特高压输电塔风振响应及等效风荷载研究[D].重庆:重庆大学,2009.
[3]程志军.架空输电线路静动力特性及风振研究[D].杭州:浙江大学,2006.
[4]谢强,张勇,李杰.华东电网500kV任上5237线飑线风致倒塔事故调查分析[J].电网技术,2006,30(10):59-63.Xie Qiang,Zhang Yong,Li Jie.Investigation on tower collapses of500kV Renshang5237transmission line caused by downburst[J].Power System Technology,2006,30(10):59-63(in Chinese).
[5]郭勇,孙炳楠,叶尹.大跨越输电塔线体系风振响应的时域分析[J].土木工程学报,2006,39(12):12-17.Guo Yong,Sun Bingnan,Ye Yin.Time-domain analysis on wind-induced dynamic response of long span power transmission line systems[J].China Civil Engineering Journal,2006,39(12):12-17(in Chinese).
[6]Momomura Y,Marukawa H,Okamura T,et al.Full-scale measurements of wind-induced vibration of a transmission line system in a mountainous area[J].Journal of Wind Engineering and Industrial Aerodynamics,1997(72):241-252.
[7]Lazzari M,Saetta A V,Vitaliani R V.Non-linear dynamic analysis of cable-suspended structures subjected to wind actions[J].Computers and Structures,2001(79):953-969.
[8]贺德馨.风工程与工业空气动力学[M].北京:国防工业出版社,2006:299-300.
[9]李正良,肖正直,韩枫,等.1000kV汉江大跨越特高压输电塔线体系气动弹性模型的设计与风洞试验[J].电网技术,2008,32(12):1-5.Li Zhengliang,Xiao Zhengzhi,Han Feng,et al.Aeroelastic model design and wind tunnel tests of1000kV Hanjiang long span transmission line system[J].Power System Technology,2008,32(12):1-5(in Chinese).
[10]陈隽,徐幼麟,李杰.Hilbert-Huang变换在密频结构阻尼识别中的应用[J].地震工程与工程振动,2003,23(4):35-42.Chen Jun,Xu Youlin,Li Jie.Hilbert-Huang transform for damping ratio identification of structures with closely spaced modes ofvibration[J].Earthquake Engineering and Engineering Vibration,2003,23(4):35-42(in Chinese).
[11]Ibrahim S R.Random decrement technique for modal identification of structures[J].Journal of Spacecraft and Rockets,1997,14(11):696-698.
[12]高至飞,于向东,钱春阳.随机减量法识别铁路桥模态参数的试验与研究[J].广东土木与建筑,2006(10):38-40.Gao Zhifei,Yu Xiangdong,Qian Chunyang.Experiment and analysis of structural natural modal parameters of railway bridge by random decrement technique[J].Guangdong Architecture Civil Engineering,2006(10):38-40(in Chinese).
[13]张景绘,唐照千.对随机减量技术的数学表示[J].应用力学学报,1984,1(2):21-32.Zhang Jinghui,Tang Zhaoqian.The mathematical expression for random decrement technique[J].Chinese Journal of Applied Mechanics,1984,1(2):21-32(in Chinese).
[14]白海峰,李宏男.大跨越输电塔线体系随机脉动风场模拟研究[J].工程力学,2007,24(7):146-151.Bai Haifeng,Li Hongnan.Simulation study of stochastic fluctuation wind field on large span electricity transmission tower-line system[J].Engineering Mechanics,2007,24(7):146-151(in Chinese).
[15]Shinozuka M,Jan C M.Digital simulation of random processes and its application[J].Journal of Sound Vibration,1972,25(1):111-128.
[16]罗俊杰,韩大建.大跨度结构三维随机脉动风场的模拟方法[J].振动与冲击,2008,27(3):87-91.Luo Junjie,Han Dajian.Simulation method for3-D stochastic wind field around long-span structures[J].Journal of Vibration and Shock,2008,27(3):87-91(in Chinese).
[17]Shinozuka M,Deodatis G.Simulation of stochastic processes by spectral representation[J].Applied Mechanics Reviews,1991,44(4):191-203.
[18]Deodatis G.Simulation of ergodic multivariate stochastic processed[J].Journal of Engineering Mechanics,1996,122(8):778-787.
[19]韩枫,肖正直,李正良,等.1000kV汉江大跨越输电塔线体系三维脉动风场模拟[J].高电压技术,2009,35(5):999-1004.Han Feng,Xiao Zhengzhi,Li Zhengliang,et al.3-D stochastic wind field simulation of1000kV Hanjiang long span transmission line system[J].High Voltage Engineering,2009,35(5):999-1004(in Chinese).
[20]李宏男,任月明,白海峰.输电塔体系风雨激励的动力分析模型[J].中国电机工程学报,2007,27(30):43-48.Li Hongnan,Ren Yueming,Bai Haifeng.Rain-wind-induced dynamic model for transmission tower system[J].Proceedings of the CSEE,2007,27(30):43-48(in Chinese).
[21]Ronaldo C B,Rosangela S R,Michele S P,et al.Dynamic behavior and stability of transimission line towers under wind forces[J].Journal of Wind Engineering and Industrial Aerodynamics,2003,91(8):1051-1067.
[22]邓洪洲,朱松晔,王肇民.大跨越输电塔线体系动力特性及风振响应[J].建筑结构,2004,34(7):25-28.Deng Hongzhou,Zhu Songye,Wang Zhaomin,Study on dynamic behavior and wind-induced vibration response of long spans transmission line system[J].Building Structure,2004,34(7):25-28(in Chinese).
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