大型浮吊承重鋼輪的承載分析及優(yōu)化設(shè)計(jì).pdf

1、同濟(jì)大學(xué)機(jī)械工程學(xué)院碩士學(xué)位論文大型浮吊承重鋼輪的承載分析及優(yōu)化設(shè)計(jì)姓名：延偉華申請學(xué)位級別：碩士專業(yè)：機(jī)械設(shè)計(jì)及理論指導(dǎo)教師：歸正20090301AbstractABSTRACTRevolvingsupportwithoutbalancebeamiscommonlyusedonsuperlargefloatingcranesButtheadjacentsteelwheelsoftenhaveunequalloadsharingInth

2、ispaperamethodofenhancingthewheels’flexibilitywithincreasingitshollownessisgiventoimprovetheagencies，andthedesiredload—sharingeffectisachievedThefirstobjectiveofthispaperistocreatefiniteelementsmodelsDozensoftwodimension

3、alandthreedimensionalwheelrailcontactmodelsarecreatedwiththeuseoffiniteelementsoftwareMareInordertogetthedetailsofcontactregionstress，allofthemodelshavemeshrefinementatthecontactregion，andtheshortestedgesinthisregionreac

4、halengthof05mmThesecondobjectiveofthispaperistodoloadanalysisofsteelwheelsCombinedwithclassiccontacttheoryandcurvebeamtheoryand3Dfiniteelementsresults，analysisshowsthattheequivalentyonMisesstresspeakisnotonthecontactsurf

5、ace，butinadistancefromthecontactsurfaceWiththeincreasingofhollowness，theeffectsofcurvebeamstressgraduallybecomelargerAndtheequivalentyonMisesstresspeaklocationchangedtooElasticfiniteelementanalysisresultsshowsthatlinecon

6、tactisbetterthanpointcontactButactuallypointcontacthasabetterloadbearingsituationthanlinecontactBasedonformuladerivation，thispapergaveareasonableexplanationThethirdobjectiveofthispaperistoascertainthebestchoiceofthehollo

7、wnessTwomethods，increasinginnerdiameterandreducingouterdiameter，havebeencompared，andthebetteronehasbeenputforwardBasedonthefiniteelementresultsandtheshakedownanalysisresult，theflexibleload—bearingcapacityandshakedownload

8、—bearingcapacityhavebeenreachedTheanalysisrevealedthatthehollowwheeldesignincreasedradialflexibilityandachievedbetterloadequalization，andalsoreducedwheelstressandenhancedloadcapacityWiththeincreasingofwheelhollownessthee