简介：这篇论文在各向异性的矩形的网孔的班上处理双线性的有限元素的高精确性分析。各向异性的网孔上的反的不平等被建立。超级结束和超级集中被获得因为第二订椭圆形的问题。数字测试被给，它与我们的理论分析与一致。

简介：Accordingtothelower-boundtheoremoflimitanalysistheRigidFiniteElementMeth-od(RFEM)isappliedtostructurallimitanalysisandthelinearprogrammingsforlimitanalysisarededucedinthispaper.Moreover,theThermo-ParameterMethod(TPM)andParametricVariationalprinciples(PVP)areusedtoreducethecomputationaleffortwhilemaintainingtheaccuracyofsolutions.Abettersolutionisalsoobtainedinthispaper.

简介：Thediaphragmofsteamturbineisoneofthemainpartsofthepassageunitforairflowing.Forstudyingitsworkingconditionandperformance,thethree-dimensionalfiniteelementmodel(FEM)withthesoftwareANSYS10.0isestablishedaccordingtotheactualworkingparameters.Withthemodel,thedeformationresultsandstressfieldresultsareanalyzedandthemaximumdisplacementandstressvaluearecalculated,meanwhile,theircorrespondingpositionsarefound.Itprovidesagoodfoundationforsolvingtheprobleminproduction.

简介：Stiffeneristheimportantmissilestructuretoensurethestructuralstrengthofthemissile.Inordertoimprovethedesignefficiencyandthequalityofthemissilestiffener,themethodsofmissilestiffenerrapidmodelingandanalysisareproposed.First,theproblemsoftraditionalmanualmodelingofthestiffenerareanalyzed.Accordingtotheproblemsandactualrequirementofmodeling,volumedecompositionmethodisusedtodividethestiffenerintotheuppersection,thelowersectionandthewebinorderforfeatureanalysisandparameterextraction.ThenbasedontheparametersthebasicunitdecomposedaboveiscreatedforBooleanoperationtoestablishthestiffener.Finally,arapidstiffenermodelingandanalysisprogramweredevelopedbasedonUGOpenAPI,themodelingandanalysisresultvalidatesthefeasibilityofthemethod.

简介：Thesteelreinforcedplasticpipeisakindofgreenenvironmentalprotectionpipelineswithdouble-sidescorrosionresistingandbetterwithstandingtomediumworkingpressure.Thestructureandtechnicalprocessofthispipearedescribedbrieflyinthispaper,andthefiniteelementanalysishasbeendoneforthesakeofunderstandingthedistributionsofstressanddisplacementinsidethispipeunderhydrostaticpressure.Theanalysisresultsareveryimportantforsafetyapplicationofthesteelreinforcedplasticpipe.

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简介：这篇论文涉及源于分子的成像的区域的一个提出病的问题并且作为BLT被知道问题。用Tikhonov规则化技术，一个二次的优化问题能被提出。我们为调整优化问题的有限元素近似提供改进错误估计。一些数字例子被举表明我们的理论结果。

简介：Inthispaperthefiniteelementmethodisusedtosolvethetwo-dimensionalgradi-entcurrentproblem,Thesolutionisobtainedbytwo-stepexplicitmethod.ItisverifiedwithgoodagreementbythefielddataofferedbyXiamenE.P.A.,Fujian,P.R.C.Theauthorsrec-ommendthattheproposedmethodissuitablefortheanalysisandcomputationoflongwavesofepeiricseaattheseawardfirth.

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简介：Theelementstiffnessmatrixoftheequivalentbeamorpipeelementofthedeformedlegoftheplatformisderivedbythefiniteelementmethod.Thestressesanddisplacementsofsomedamagedcomponentsarecalculated,andthenumeri-calsolutionsagreewellwiththoseobtainedbythefinemeshfiniteelementmethod.Finally,asanapplicationofthismethod,thestressesofsomeplatformstructuresarecalculatedandanalyzed.

简介：Developingtheradiographicimagesfromtwotothree-dimensional,finiteelementanalysis(FEA)technologycansetupthemodel,predictingdiagnosis,treatmentdesign,aswellassurgicalplan.FEAprovidesanaccuratethree-dimensionalfiniteelementbiomechanicalstudyinosteonecrosisoffemoralhead(ONFH).Thepapersinthelatest5yearsrelatedtofemoralheadosteonecrosisandfiniteelementanalysisapplicationareconcentratedon.Wesummarizethelatestresearchprogressandproblems,includingtheappliedresearchcarriedoutinthefemoralheadosteonecrosisclinicalcases,innovationalskills,soastopointoutthedirectionoffutureresearchinFEA.

简介：Rollingbearingiswidelyusedinmechanicalsupport,itsgeneralcomponentsaretheinnerring,outerring,theball,retaineretc..Nowmanycompaniesindevelopedcountriesanduniversityintherollingbearingastheresearchobject,andhasmadegreatprogressindesigntheory,theexperimentmethodandproductiontechnologyetc.WewillusethefiniteelementANSYStoestablishthemodelofdeepgrooveballbearing.Throughthecontactanalysis,wecangetthecontactstressbetweentheringsandballs,strain,contactstate,penetration,slidingdistanceandthefrictionstressdistribution.ThesevaluesarecomparedtothetheoreticalvalueswithHertztheory,andtheyhavebetterconsistency,providethegoodtheoreticalbasisfortheoptimizationdesignofrollingbearings.

简介：Inrecentyears,inflatablestructureshavebeenasubjectofinterestforspaceapplicationssuchascommunicationantenna,solarthermalpropulsionandentry/landingsystems.Theinflatablestructurescharacterizedbyhighstrength-to-massratios,minimalstowagevolume,whichmakesthemsuitableforcost-effectivelargespacestructures.Atypicalexamplefortheinflatablestructureistheinflatedtoruswhichoftenusedinordertoprovidestructuresupport.Inthisstudy,ourmainfocusistounderstandthedynamiccharacteristicsofaninflatedtorusinordertoformulateanaccuratemathematicalmodelsuitableforactivevibrationcontrolapplications.Acommercialfiniteelementpackage,ANSYS,isusedtomodeltheinflatedtorus.Toverifythemodeltheobtainedfrequenciesandmodeshapesarecomparedwiththepublishedresults,whicharederivedusinganalyticalapproach,theverificationshowsagoodagreementbetweentheFEMandtheanalyticalresults.Basedontheverifiedmodel,parametricstudywasinvestigated;thematerialthicknessincreasecausesthenaturalfrequenciesdecrease,whiletheincreaseoftheinflationpressuresimplyresultsinstiffeningthering,whichmeansthatthenaturalfrequencyincreased.TheFEManalysisgivesaneasyandfastwayforthevibrationanalysisofthestructurescomparedwiththecomplicatedanalyticalsolutions.

简介：Thebasicideaofthefiniteelementbeampropagationmethod(FE-BPM)isdescribed.Itisappliedtocalculatethefundamentalmodeofachannelplasmonicpolariton(CPP)waveguidetoconfirmitsvalidity.Boththefielddistributionandtheeffectiveindexofthefundamentalmodearegivenbythemethod.Theconvergencespeedshowstheadvantageandstabilityofthismethod.Thenaplasmonicwaveguidewithadielectricstripdepositedonametalsubstrateisinvestigated,andthegroupvelocityisnegativeforthefundamentalmodeofthiskindofwaveguide.Thenumericalresultshowsthatthepowerflowdirectionisreversetothatofphasevelocity.

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简介：Numericalsimulationconcerningtheformingandweldingprocessofspiralweldedpipewasconducted,whichincludedthreesteps:thefirststepwasthestressanalysiswhenthespiralwasformed,andthenthestresswasregardedasinitialconditionofmeldingduringthetemperaturefieldanalysisintheprocessofwelding,thelaststepwasthethermalstressanalysisoftheweldseamaftertheweldingwasover.Moreover,whenthesteelstripwaspushed,thestresswasalsocalculatedbynon-linearitycontacttechnologyusingAbaqusSoftware.Byfiniteelementmodelingandcalculatingoftheformingandweldingprocessofthespiralweldedpipe,thekeypointsofthemulti-fieldssyntheticsimulatingwerestudiedanddiscussed.

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简介：Inthispaper,thelinearmixedfiniteelementmethodisconsideredforthebiharmonicDirichletboundaryvalueproblem.Almostoptimalerrorestimates,superconvergenceestimatesandthederivativeerrorexpansionareobtained.