输电塔线体系风洞试验模型的变比例问题分析
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摘要
塔线体系的气弹模型风洞试验时,由于模型制作和现有风洞尺寸条件的限制,输电塔线体系中塔与线保持相同比例的气弹模型制作难度很大,往往需要将导线跨度的比例缩小。从数值分析的角度出发,以某1 000 kV双回路线路的一段塔线体系为例,铁塔保持不变,导线的缩聚比例分别为1.00、0.50、0.25的情况进行顺风向的风振响应时程分析。结果显示,导线比例缩聚后,塔线体系的风振响应基本保持一致,缩聚模型的风洞试验结果可以比较准确的反映原型的风振响应。
Because of the limitation of the model making and the existing wind tunnel's size,it is difficult to keep the line and tower in the same scaling factor in developing the aeroelastic model of the power transmission lines system,and a distorted scaling factor is needed in span length of the lines.With the instance of a 1 000 kV two-circuit power transmission lines,the finite element analysis under the along-wind load in time history is conducted with keeping the tower in the same and the line scaling factor being 1,0.5 and 0.25 respectively.The results show that the response of the power transmission lines systems keep in the same,and then the wind-induced vibration of the distorted model in the wind tunnel test can actually reflect the response of the power transmission lines system under the wind load.
Because of the limitation of the model making and the existing wind tunnel's size,it is difficult to keep the line and tower in the same scaling factor in developing the aeroelastic model of the power transmission lines system,and a distorted scaling factor is needed in span length of the lines.With the instance of a 1 000 kV two-circuit power transmission lines,the finite element analysis under the along-wind load in time history is conducted with keeping the tower in the same and the line scaling factor being 1,0.5 and 0.25 respectively.The results show that the response of the power transmission lines systems keep in the same,and then the wind-induced vibration of the distorted model in the wind tunnel test can actually reflect the response of the power transmission lines system under the wind load.
引文
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[2]郭勇,孙炳楠,叶尹.大跨越输电塔线体系气弹模型风洞试验[J].浙江大学学报:工学版,2007,41(9):1482-1486.GUO YONG,SUN BING-NAN,YE YIN.Wind tunneltest on aeroelastic model of long span transmission linesystem[J].Journal of Zhejiang University:EngineeringScience,2007,41(9):1482-1486.
[3]郭勇.大跨越输电塔线体系的风振响应及控制研究[D].浙江:浙江大学,2006.
[4]李正良,肖正直,韩枫,等.1 000 kV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 ZHENG-LIANG,XIAO ZHENG-ZHI,HAN FENG.Aeroslastic model design and wind tunnel tests of 1 000 kVhanjiang long span transmisson line system[J].PowerSystem Technology,2008,32(12):1-5.
[5]李正良,肖正直,郑怀清,等.1 000 kV特高压输电铁塔风振响应及风洞试验研究[J].防灾减灾工程学报,2008,28(增):58-62.XIAO ZHENG-ZHI,LI ZHENG-LIANG,ZHENGHUAI-QING,et al,Wind tunnel tests and wind-inducedresponse analysis of 1 000 kV UHV transmission tower[J].Journal of Disaster Prevention and MitigationEngineering,2008,28(suppl):58-62.
[6]韩银全,梁枢果,邹良浩,等.输电塔线体系完全气弹模型设计[C]∥第十三届全国结构风工程学术会议论文集(上册).大连:中国土木工程学会桥梁与结构工程分会风工程委员会,2007:260-265.
[7]CLUNI F,GUSELLA V,BARTOLI G.Wind tunnelscale model testing of suspended cables and numericalcomparison[J].Journal of Wind Engineering andIndustrial Aerodynamics,2008,96(6/7):1134-1140.
[8]BARTOLI G,CLUNIB F,GUSELLA V,et al.Dynamics of cable under wind action:wind tunnelexperimental analysis[J].Journal of Wind Engineeringand Industrial Aerodynamics,2006,94(3)259-273.
[9]克莱斯.迪尔比耶,斯文.奥勒.汉森.结构风荷载作用[M].薛素铎,李雄彦,译.北京:中国建筑工业出版社,2006.
[10]中华人民共和国国家标准.GB50009-2001建筑结构荷载规范[S].北京:中国建筑工业出版社,2002.
[11]张希黔,葛勇,严春风,等.脉动风场模拟技术的研究与发展[J].地震工程与工程振动,2008,28(6):206-212.ZHANG XI-QIAN,GE YONG,YAN CHUN-FENG,et al.Advances in research of simulation technology offluctuation wind loading[J].Journal of EarthquakeEngineering and Engineering Vibration,2008,28(6):206-212.
[12]韩枫,肖正直,李正良,等.1 000 kV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,2009,39(5):999-1004.HAN FENG,XIAO ZHENG-ZHI,LI ZHENG-LIANG,et al.3D stochastic wind field simulation of 1 000 kVHanjiang long span transmission line system[J].HighVoltage Engineering,2009,39(5):999-1004.
[13]埃米尔.希缪,罗伯特.H.斯坎伦.风对结构的作用:风工程导论[M].刘尚培,项海帆,译.上海:同济大学出版社,1992.
[14]张相庭.结构风工程:理论.规范.实践[M].北京:中国建筑工业出版社,2006.
[15]DAVENPORT A G.The dependence of wind load uponmeteorological parameters[C]∥Proceedings of theInternational Research Seminar on Wind effects onBuilding and Structures,1968,Toronto,Canada.Toronto:University of Toronto Press,1968:19-82.
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