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750kVLGJK30050扩径导线的有限元建模及模态分析（英文）.docx

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750kVLGJK30050扩径导线的有限元建模及模态分析（英文） Title:FiniteElementModelingandModalAnalysisof750kVLGJK30050OverheadConductor Abstract: Thispaperpresentsadetailedfiniteelementmodelingandmodalanalysisofthe750kVLGJK30050overheadconductor.Theaimofthisstudyistounderstandthemodalcharacteristicsanddynamicbehavioroftheconductorunderdifferentloadingconditions.Acomprehensivenumericalmodelisdevelopedusingthefiniteelementmethod(FEM)tocapturethestructuralresponseoftheconductor.Modalanalysisisperformedtoidentifythenaturalfrequenciesandmodeshapesoftheconductor.Theresultsobtainedfromthemodalanalysisarediscussed,interpreted,andcomparedwiththetheoreticalvalues. 1.Introduction The750kVLGJK30050overheadconductoriswidelyusedinextrahigh-voltagetransmissionlinesduetoitshighelectricalconductivityandmechanicalstrength.Understandingthemodalcharacteristicsoftheconductoriscrucialforthedesignandanalysisofoverheadtransmissionsystems.Thefiniteelementmethodhasproventobeaneffectivetoolformodelingandsimulatingthebehaviorofcomplexstructures.Inthispaper,adetailedfiniteelementmodeloftheLGJK30050conductorisdeveloped,andmodalanalysisisperformedtoinvestigateitsdynamicresponse. 2.FiniteElementModeling Thefiniteelementmodel(FEM)oftheLGJK30050conductorisdevelopedusingthree-dimensionalsolidelements.Theconductorismodeledasabeam-likestructurewithappropriateboundaryconditions.ThematerialpropertiessuchasYoung'smodulusanddensityareconsideredinthemodeltoaccuratelydepictthebehavioroftheconductorunderdifferentloadingconditions.Thegeometryoftheconductor,includingitscross-sectionaldimensionsandlength,isdefinedbasedonthespecificationsprovidedbythemanufacturer. 3.ModalAnalysis ModalanalysisisperformedtodeterminethenaturalfrequenciesandmodeshapesoftheLGJK30050conductor.Theeigenvalueproblemissolvedusingappropriatenumericaltechniquestoobtainthemodalparameters.Thefirstfewnaturalfrequenciesandcorrespondingmodeshapesareextractedandcomparedwiththetheoreticalvalues.Thisanalysisprovidesvaluableinsightsintothedynamicbehavioroftheconductorandhel