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1、重庆大学硕士学位论文张力和拉线张力的变化。研究发现，随着导地线张力的增大，立柱位移平均值减小，动力值略微增大，风振系数增大，但变化都不是很明显。随着拉线张力增大，立柱的位移平均值变小，而动力响应增大，总体动力放大系数增大。文中进行了导线的气动弹性时程分析，结果表明考虑气动弹性比不考虑的风振系数要小。④拉线断裂研究。文中建立了断线的有限元分析模型，实现了断线工况模拟与分析。分析结构表明，随断线数目的增加，立柱位移均大幅增大，并且呈现出明显的非线性关系，导地线的张力和立柱内力也明显增大。拉线断线可能会导致地线断线，但由于导线的放大系数不是很大
2、，所以预计结构仍然是稳定的。关键词：拉线塔，风振分析，拉线断裂II英文摘要ABSTRACTSuspensioncableguyedtowerisatall,highsoft,large-spanstructure.Itisakindofwindsensitivestructure.Andinthedesignofanchortowerstructure,windloadusuallytendtobethecontrolload.Becauseofitslargeflexibility,anchortower,underpulsatingw
3、indload,willgeneratealargegeometricdeformation.Therefore,guyedtowerstructurepossessesgeometricnonlinearity.Thetowerandlinesoftheanchortowerstructurehavemutualcouplingeffects.Transmissionlineswillaffectthestiffnessandinternalforceofthemaincolumnofthetower.Thusthewindvibrat
4、ionresponsesofthetowerarealsononlinear.UHVtransmissionlinesandultra-highvoltagetransmissionlinesaredifferentinmanyways.Andthus,fortheUHVtransmissiontower,thesedifferencesmaketheheadsizeandheightofthetowerincreased,theweightandtheloadsoftowerarealsoincreaseaccordingly.Cons
5、ideringthefactorsmentionedabove,thisarticlehascarriedonthedynamictimehistoryresponseanalysisoftheUHVanchortowerstructuresubjectedtofluctuatingwindload.Transmissiontowerstructureisgenerallydividedintotwomajorcategories:free-standingtransmissiontowerandanchortower.Suspensio
6、ncableguyedtowerstructureisaformofanchortowerstructure.Thoughfree-standingtowerhaslargerdeadload,biggerquantityandhighercost,itismorewidelyadaptable,andcanbeappliedtoavarietyofterrain.Onthecontrary,anchortower,thoughhaslighterweight,smallervolume,lowercost,itsuseislimited
7、bycertainterrainconditions.Learnedfrompreviousengineeringexperience,comparedwithfree-standingtower,theguyedtowerhas20%~50%lessdeadload.So,guyedtowercanapparentlycutthecost.Then,intheregionwithlowrelief,usetheanchortowerstructureismoreappropriate.Thewindvibrationanalysisin
8、thispaperisbasedon±800kVUHVdclinesthroughthegobidesertregioninxinjiang,themaincontentsandresults
