大吨位双回转铁路救援起重机三节伸缩臂截面优化-研究

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1、西南交通大学硕士研究生学位论文第1I页AbstractTodaycraneshavethetrendsoflargetonnageandhighliftingheight，jibasthemainbearingcomponentofrailwayrescuecrane，whosedesignisreasonableornot，directlyaffectstheperformanceofthemachinelifting．Thispaperstudieslarge-tonnage(160t)dualrotaryrailwayresc

2、uethreesectiontelescopicjibcranebasedonmultiplesoftware．WeuseOptiStructsoftwaretodesigntheconceptualdesigntopologyoptimizationforthetelescopiccross—section，andWorkbenchtodesigngeometricmodeling，finiteelementanalysisandsizeoptimization．Themaincontentsareasfollows：(1)Thi

3、spaperdescribestheresearchstatusanddevelopmenttrendofdomesticandinternationalrailcrane，andintroducesseveralcommontypesofcrane—section，itconductsoveralldesignofthetelescopicjibandrelatedcalculationsintermsoftherequirementsoftelescopicjibcranes，toprovidethebasisofoptimiz

4、ationstudies．(2)Theideallargetelescopicarmofroundedrectanglecross—sectioncanbegotthroughcomparativeanalysisbasedonSolidworksModeling，HypermeshmeshingandOptiStructtopologyoptimization．Weuseheuristicalgorithmtoderivetopologyoptimizationprohlemsoftheminimumflexibility，use

5、volumefractionasaconstraint，aimatminimumflexibility，setrectangularcross-sectionastheoriginalcross，takedangeroussectionboominstabilitynearhalfthebandestablishedtopologyoptimizationmodel，taketopologyoptimizationmethodbasedononebyoneSIMP．Asresearchesshows：itisthekeytosets

6、uitableparametertogettheidealtopologyresults，anditcanbefoundthatitissuitabletosetvolumefractionsas0．35and25mmforcellsize；obviously,differentloadingactondifferentpositionofthetelescopicboom，suchasmomentsmainlyactupperandunderflangeoftheboomwhileaxialforcesmainlyactonann

7、ularregionofallsides．Roundedrectanglecross—sectiongotbytopologyoptimizationcanbeappliedtolargetonnagerailwaycranetelescopicjibanditprovesthatit’Sfeasibletoapplytopologyoptimizationtocrosssectionoptimizationconceptdesignofthreesectiontelescopicboomcrane，alsoitprovidesth

8、enewcluesforoptimizationstructuredesignofcrane．(3)Usingthelargeroundedrectangularcross—sectionsasthesectionaltypearm，