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时间:2020-03-28
《风载及导线拉拽复合作用下的高压输电铁塔响应分析.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第42卷第5期华北电力大学学报Vo1.42.No.52015年9月JournalofNoahChinaElectricPowerUniversitySep.,2015doi:10.3969/j.ISSN.1007—2691.2015.05.11风载及导线拉拽复合作用下的.____一同I--I压输电铁塔响应分析何玉灵,梁雄,唐贵基(1.华北电力大学能源动力与机械工程学院,河北保定071003;2.成都铁塔厂四川成都610000)摘要:旨在获取风载及导线拉拽复合作用下的高压输电铁塔应力、变形响应及疲劳响应。首先分析了风栽与拉拽作用下的铁塔载荷分布,建立了铁塔与风流的有限元分析模型并进行
2、了动特性分析;然后用ANSYS进行了静态响应、谐响应、疲劳响应分析,得到了30m/s风速下0。、45。和90。风载及导线拉拽复合作用下的应力及变形情况;获取了不同风向情况下铁塔的最大应力和最大变形部位、疲劳响应的危险位置点。结果表明,塔脚斜材下段中部、横担上拉杆中部、横担与导线连接处、塔身中部的横隔是最大应力和最大变形的集中部位;下横担下方第一个横隔与主材连接处、上、下横担与导线连接处是疲劳失效危险位置。关键词:高压输电铁塔;风载;导线拉拽;响应中图分类号:TM75文献标识码:A文章编号:1007—2691(2015)O5—0062—07AnalysisonHigh·voltage
3、TransmissionTowerResponseUnderCouplingActionofWindLoadandWirePullingHEYuling,LIANGXiong,TANGGuiji(1.SchoolofEnergyPowerandMechanicalEngineering,NorthChinaElectricPowerUniversity,Baoding071003,China;2.ChengduTowerPlant,Chengdu610000,China)Abstract:Theintentofthispaperistoobtainthestressanddefor
4、mationresponsesunderthecouplingactionofwindloadandwirepullingofthehighvoltagetransmissiontower.TheFEmodelofthetowerandthewindwasfirstlybuilt,andthedynamictraitsofthetowerwereanalyzed,basedontheanalysisoftheloaddistribution.Then,thestaticanal·ysis,theharmonicresponseanalysis,andthefatigueanalys
5、iswereconductedwithANSYS,inwhichthestressandthedeformationresponsesunderthecouplingactionofthewindwithavelocityof30m/sandthewirepullingwhenthewinddirectionis0。,45。and90。wererespectivelycalculated.Andtheexactpositionsofthemaxstressanddeformation,andthedangerousfatiguepointswerealsoobtained.Ther
6、esultsshowedthattheseriouspositionsofthestressandthedeformationwereatthelowerhalfofthediagonaljointtothetowerfoot,themediumoftheupperpullrodofthecrossarm,thejointplacesbetweenthecrossarmandthewire,andthetabulaatthemediumofthetower.However,thedangerousfatiguepointswereatthejointplacebetweenthet
7、abulaandthemainbarnearthelowercrossarm,andthejointplacebetweenthewireandthecrossarms.Thefindingsinthepaperofferareferenceforthetowermaintenanceanditsstructuralimprovement.Keywords:highvoltagetransmissiontower;windload;wirepulling;respon
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