大型浮吊承重鋼輪的承載分析及優(yōu)化設計.pdf

1、同濟大學機械工程學院碩士學位論文大型浮吊承重鋼輪的承載分析及優(yōu)化設計姓名：延偉華申請學位級別：碩士專業(yè)：機械設計及理論指導教師：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