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1、摘要AbstractWiththeadvantageofsimplerstructure,bettermechanicalperformance,convenientforconstructionandeconomical,theapplicationofguyedtowerinUHVDCtransmissionlineiswidelyappreciatedbyengineeringcircles.Threekindsofcommonlyusedcablestructureform-findingmethods,i.e.directiterativemethodandform-fin
2、dinganalysismethodandV-lineanalysismethod,wereanalyzedinthispaper.Throughfiniteelementanalysisandcalculation,theV-lineanalysismethodwasprovedtobemoreaccurateforguycable’sform-finding.Onthisbasis,theANSYSparametricmodelingmethodforguyedtowerwasgiven,theAPDLcommandstreamwaswrote,andthefiniteeleme
3、ntmodelofsingle-mastguyedtowerin±800kVUHVDCtransmissionlinewerebuilt,theloadonguyedtowerwascalculatedandapplied,throughnonlinearfiniteelementcalculationthesingle-mastguyedtower’smechanicalcharacteristicsunderdifferentworkingconditionwasgot,variouskindsofstructureparametersandloadparameters’infl
4、uenceruleonthetower’smechanicalcharacterwasobtained,andthevibrationfrequencyofthetowerwascalculated.Resultshowsthat,theV-lineanalysismethodisanaccuratemethodforguycable’sform-finding.Underwind-loadstate,wheninitialguycableprestressislessthancriticalguycableprestress,withthegrowthofinitialguycab
5、leprestress,nodes’displacementdecreasesandtheslopeoflegmember’saxialforcechangeissmall.Wheninitialguycableprestressislargerthancriticalguycableprestress,withthegrowthofinitialguycableprestress,nodes’displacementstaysandtheslopeoflegmember’saxialforcechangeisgreat.Underwind-loadstate,themast’sno
6、des’displacementisthesuperpositionofrigidbodyrotationandbendingdeformation.Undericecoveredstate,themast’snodes’displacementisthesuperpositionofrigidbodyrotation,bendingdeformationandtorsiondeformation.Keywords:guyedtower;staticanalysis;dynamicanalysis;nonlinearfiniteelement;initialguycableprest
7、ressII目录目录摘要................................................................................................................IAbstract.................................................................................................
