有限元分析系统的发展现状与展望外文翻译演示教学.docx
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有限元分析系统的发展现状与展望外文翻译演示教学.docx
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有限元分析系统的发展现状与展望外文翻译演示教学
Finiteelementanalysissystemdevelopmentpresentsituationandforecast
Alongwithmodernscienceandtechnologydevelopment,thepeopleunceasinglyaremakingthefastertransportationvehicle,thelarge-scalebuilding,thegreaterspanbridge,thehighefficiencypowersetandtheprecisermechanicaldevice.Alltheserequestengineertobeablepreciselytoforecastinthedesignstagetheproductandtheprojecttechnicalperformance,needstobestatic,technicalparameterandsoondynamicstrengthtothestructureaswellastemperaturefield,flowfield,electromagneticfieldandtransfusioncarriesontheanalysiscomputation.Forexampleanalysiscomputationhigh-riseconstructionandgreatspanbridgewhenearthquakereceivestheinfluence,hasalookwhethercanhavethedestructiveaccident;Theanalysiscalculatesthenuclearreactorthetemperaturefield,thedeterminationheattransferandthecoolingsystemarewhetherreasonable;Analyzesinthenewleafbladethehydrodynamicsparameter,enhancesitsoperatingefficiency.Thesellmaysumupasthesolutionphysicsquestioncontrolpartialdifferentialequationsoftenisnotimpossible.
Inrecentyearsthefiniteelementanalysiswhichdevelopsinthecomputertechnologyandunderthenumericalanalysismethodsupport(FEA,FiniteElementAnalysis)thesideprincipleforsolvesthesecomplexprojectanalysisestimationproblemstoprovidetheeffectiveway.Ourcountryin"95"PlanperiodvigorouslypromotestheCADtechnology,mechanicalprofessionlargeandmiddlescaleneterriesCADpopularratefrom"85"End20%enhancesthatpresent70%.WithenterpriseapplicationofCAD,engineeringandtechnicalpersonnelhasgraduallygetriddrawingboard,andwilljointhemainenergyhowtooptimizethedesign,engineeringandimprovingthequalityofproducts,computer-aidedengineeringanalysis(CAE.ComputerAidedEngineering)methodandsoftwarewillbethekeytechnicalelements.
lnengineeringpractice,finiteelementanalysissoftwareandCADsystemintegrationdesignstandardsshouldbeaqualitativeleap,mainlyinthefollowingaspects:
Theincreasedesignfunction,reducesthedesigncost;
Reducesdesignandtheanalysiscycleperiod;
Increaseproductandprojectreliability;
Usestheoptimizeddesign,reducesthematerialtheconsumptionorthecost;
Discoversthelatentquestioninadvancebeforetheproductfactureortheprojectconstruction;
Simulateseachkindofexperimentalplan,reducestheexperimentaltimeandthefunds;
Carriesonthemachineaccidenttoanalyze,searchaccidentcausefactor.
InvigorouslypromotestheCADtechnologytoday,fromthebicycletotheaerospacecraft,alldesignsmanufactureallwillnotbeabletoleavethefiniteelementanalysiscomputation,FEAobtainsthemoreandmorewidespreadvalueintheengineeringdesignandtheanalysis.ThenextchartistheAmericanSanFranciscobaybridgeearthquakerespondsthecomputationthefiniteelementanalysismodel.Thedevelopmentdirectionandonsignificantprogressinternationalearly20thcenturyintheendofthe50's,atthebeginningofthe60'shastheformidablefunctionontheinvestmentmassivemanpowerandthephysicalresourcedevelopmentthefiniteelementanalysisprocedure.Whatismostfamouswas(NASA)entrustsUSbyAmericancountrySpaceAgencyin1965tocalculatetheNASTRANfiniteelementanalysissystemwhichthescientificcompanyandtheBellaerospacesystemcompanydeveloped.
Thissystemdevelopmentuntilnowhadseveraldozenseditions,isinthepresentworldthescaleisbiggest,thefunctionstrongestfiniteelementanalysissystem.Fromatthattimetothepresent,theworldeachplacedevelopmentfacilityandtheuniversityalsodevelopedonebatchofscalessmallerbuttousenimble,thepriceislowerspecial-purposeorgeneralfiniteelementanalysissoftware,mainlyhadGermanASKA,England'sPAFEC,France'scompany'stheandsoonSYSTUS,US'SABQUS,ADINA,ANSYS,BERSAFE,BOSOR,COSMOS,ELAS,MARCandSTARDYNEproduct.NowontheinternationalFEAmethodandthesoftwaredevelopmentpresentsbelowsometendencycharacteristics:
1.developsfromthepurestructuremechanicscomputationtosolvesmanyphysicalfieldsquestionfiniteelementanalysismethodmostearlyiscomesfromthestructurematrixanalysisdevelopment,graduallypromotestotheboard,theshellandtheentityandsoonthecontinualbodysolidmechanicsanalysis,thepracticeprovedthisisoneextremelyeffectivenumericalanalysismethod.Moreovertheoreticallyalsoalreadyproved,solongasusesintobeseparatedsolutionobjecttheunitenoughtobesmall,theobtainedsolutionmayenoughapproachtotheprecisevalue.
Thereforetherecentyearsfiniteelementmethodhasdevelopedquestiontheandsoonhydromechanics,temperaturefield,electricityconduction,magnetic
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