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1、华中科技大学硕士学位论文AbstractCompliantmechanismshaveincomparableadvantagesovertherigidmechanismsinsomeway,suchasindependenceoftransmissionvice,theminiaturizationofstructuresandsoon,whichresultfromitscharacteristicsoftransmissiondrivenbyelasticdeformation.Theyarewidelyusedinabroadrangeofhigh-techfieldsvaryin
2、gfromaerospacetomicro-electromechanicalsystems.Theapplicationoftopologyoptimizationmakesthedesignofcompliantmechanismfreefromthetraditionalpatternofoverdependenceonartificialexperience,andbecomesystematicallyandscientifically.Therefore,itisofprodigiousapplicationvalueandresearchsignificance.However
3、,topologyoptimizationofcompliantmechanismiseasilyoccurtheone-nodeconnectedhingesproblem,causestressconcentrationandleadtofracturefailure;ontheotherhand,thecompliantmechanismsoptimizedbyexistingtopologyoptimizationtechnologyareoftennotconformtopracticalprojects,difficultinmodelextractingandmanufactu
4、ring.Howtoefficientlydecreasetheone-nodeconnectedhinges,shortenthedeviationbetweentopologicaldesignandengineeringpracticeaswellasstrengthenthemanufacturingperformanceofthetopologystructureisessentialtorealizetopologyoptimizationmethodsformanufacturing.Thispaperanalyzesoverseasanddomesticresearchsta
5、tusoftopologyoptimizationusedincompliantmechanism,focusontheone-nodeconnectedhingesproblemandpost-processingproblem,themainworkincludesthefollowingaspects:Firstly,thisthesisdeeplyinvestigatestheresearchstatusoftopologyoptimizationusedincompliantmechanism,discussesthesolvingprocedureofSolidIsotropic
6、MicrostructureswithPenalizationMethod(SIMP)andParameterizationLevelSetMethod(PLSM),aswellascomparestheadvantagesanddisadvantagesofSIMPandPLSM.Secondly,onthebasisofpreviousstudies,thispaperproposesthemathematicalmodelofthecompliantmechanismmulti-objectivetopologyoptimizationproblem,andcombinesdensit
7、yfilteringapproachwithsensitivityfilteringtechnologytoreducetheone-nodeconnectedhingesproblem.Itmakestheresultsmeettherequirementofthestructurebearingcapacity,aswellasimprovetheoutputcharacteristics.Theeffe