10491.多載荷條件下結構形狀優(yōu)化特性的研究

1、揚州大學碩士學位論文多載荷條件下結構形狀優(yōu)化特性的研究(申請碩士學位)高帥指導教師：吳志學教授揚州大學中華人民共和國，揚卅2016年06月ABSTRACTIIIStructureshapeoptimizationmainlyresearchhowtodeterminethedesignboundaryofthecontinuousstructures，withseveralboundaryandconstraintconditionsn

2、eeded，suchthatmostlikelyteducethestressconcentrationinordertoimprovethestructurebearingcapacityorextendtheservicelifeofthestructuresFortheresearchabouttheoptimizationproblemundertheconditionofsingleloadhasmadealotprogres

3、s，suchastheoptimalcriteriaundersingleloadcondition，variousoptimizationmethodseta1Howeverinfact，duetothechangeofenvironment，thedeviationofmanufactureandassemble，andthefrictionorwearandtearassociatedwithtime，structureorcom

4、ponentisoftensustainedvariousloadingsinsteadofsingleloadduringitsserviceperiodTheoptimalshapebasedonthesingleloadconditionpossiblybecomeunfavorabletesisttheexternalvariousloadTherefore，tOcarryoutthestudyonstructuralshape

5、optimizationunderthemultipleloadshasimportanttheoreticalsignificanceandpracticalapplicationvalueOptimizationisaprocessofbeginningfromaninitialstate，thengraduallyapproachinganoptimalsolutionaftersomeiteration；Onthecontrar

6、ystartingfromanoptimalstateinsteadofaninitialstate，andthencombiningmanyfeatureinformationreflectedbytheoptimalstateintotheoptimizationalgorithm，ifweCallgetthemthroughtheoreticalanalysisorlogicalreasoning，whichundoubtedly

7、hasgreathelptOsolvetheoptimizationproblemBasedontheaboveidea，thistextcarriedoutadetailedresearchabouttheoptimalshapecharacteristics，whichachievedfromthestructureshapeoptimizationproblemundermultipleloadsforthepurposeofge

8、ttingtheminimumofmaximumstressonthedesignboundaryTheclassicproblemofelasticmechaIlics————thestressconcentrationoftheinfiniteplate、ⅣitllacenterholeisappliedinthistaskandinordertoimprovetheefficiencythewholeanalysisusetheA

9、nsysParameterDesignLanguage(APDL)withtheplatformofANSYS120Atfirst，thepapergavethetheoreticalproofforthemostoptimalcharacteristicofstructuralshapeunderthesingleload(thestressdistributiononthedesignboundaryintheoptimalstat

10、eisuniform)andcarriedouttheverificationwiththedesignofshouldertransitioncurve，andputawardthenecessaryconditionforstructureshapeoptimization：themaximumstressontheoptimaldesignboundaryobtainedfromalltheeffectiveloadsisequa

11、l，ifalsotheyareindependentThen，weprovedthecharacteristicusingreverselogicreasoningmethod，alsoraisedconditionthatcontinuouslyvariableloadswithsingleparameterhastheonlyeffectiveload，atthesametime，carriedoutthesimulateanaly