挖掘机平台有限元分析及回转液压系统仿真

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1、西南交通大学硕士学位论文挖掘机平台有限元分析及回转液压系统仿真姓名：陆军坊申请学位级别：硕士专业：机械电子工程指导教师：邓斌20080501西南交通大学硕士研究生学位论文第1I页AbstractInrecentyears，smallhydraulicexcavatorsplayanimportantroleinconstructionmachinerywiththerapiddevelopmentofindustry．Therequirementforboththequantityandtheperformanceofexcavatorhasbe

2、comeincreasinglyhigher．Atpresent，peopleusuallydesignhydraulicsystemofcrawlercranebyexperienceandanalogy，andthenfindproblemsaftertheprototypemachinetestinthedomesticmanufactories．Itnotonlycostsmuchtimeandenergybutalsocontainsenormouseconomyrisk．ThestructuralstrengthanalysiSofe

3、xcavatorswithfiniteelementmethodisanimportantwaytoimprovethequalityofdesign．Slewingmechanismisoneofthemostimportantmechanismsforcrawlercrane。ofwhichdynamiccharacteristicsaffectthewor．kingperformanceofwholemachinedirectly．AftersystematicanalysiSandresearchonthebackgroundofthes

4、ubject—PZ70smallhydrauiicexcavator，whichisdevelopedbyPushHeavyMachineryLimitedCompany，wemainlymadethestudyasfollow：(1)AccomplishingthedesignofrotaryplatformofsmallhydraulicexcavatorsandtheassemblyofthreedimensionmodelonthebasiSofUG．(2)Therotatingplatformisresearched，byprecise

5、analyzingofforceintwodifferentSituations．ImprovementsuggestionsforstructureofplatformareadvancedaccordingtotheresultsofFEManalysiS．(3)Basedontheresearchondynamicbehaviorsofprototype．thesimulationmodelofslewinghydraulicsystemiSbuildusingAMESimsoftwareanditscorrectnessisvalidat

6、edthroughtheexperiment．(4)Majorfactorswhichaffecttheslewinghydraulicsystemareanalyzedbysimulation．Inordertoreducetheimpactofrotarybrake。slewinghydraulicsystemisimprovedandanalyzedbysimulation．Insummary，thispaperpresentsacompleteFEMmodelofplatformanddynamicsimulationofslewingh

7、ydraulicsystemonexcavator．A11researchresultsnotonlyplayanimportanttheory—instructingroleinimprovement，optimizationanddesignofplatformandslewinghydraulicsystem,butalsohaveagoodchancetobeappliedinpracticaldesign．KeyWords：SmalIHydraulicExcavator：PIatform；FiniteElement：SlewingHyd

8、raulicSystem；Simulation西南交通大学曲南父遗大罕学位论文版权使用授权书本学位论文作者完全了解学校有关保留、使用学位