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单层球面网壳基于节点构形度的刚度均匀性判定准则.docx

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单层球面网壳基于节点构形度的刚度均匀性判定准则 1.Introduction Single-layersphericalshellstructuresarewidelyusedinvariousindustriesduetotheirhighstrength-to-weightratioandaestheticappeal.Themechanicalpropertiesofthesestructuresdependonfactorssuchasthematerialproperties,geometricdimensions,andthestructuraldesign.Oneimportantaspectofthestructuraldesignisthenodeconfiguration,whichiscrucialforachievinguniformstiffnessandavoidingstructuralinstability. Theaimofthispaperistodevelopacriterionfordeterminingthestiffnessuniformityofsingle-layersphericalshellstructuresbasedonnodeconfiguration.Thepaperisorganizedasfollows:Section2providesabriefoverviewofsingle-layersphericalshellstructuresandrelevantliterature.Section3proposesanewcriterionfordeterminingthestiffnessuniformitybasedonnodeconfiguration.Section4presentssimulationresultstovalidatetheproposedcriterion.Section5concludesthepaperanddiscussesimplicationsforfutureresearch. 2.LiteratureReview Single-layersphericalshellstructureshavebeenstudiedextensivelyintheliterature,bothintermsofanalyticalandnumericalmethods.Studieshaveshownthatnodeconfigurationplaysacrucialroleindeterminingthestructuralbehaviorofsphericalshellstructures.Forinstance,Wangetal.(2016)investigatedtheinfluenceofnodeconfigurationontheenergy-absorbingcapacityofsphericalshellstructuresunderlateralimpact.Theyfoundthatcertainnodeconfigurationsweremoreeffectiveinabsorbingenergythanothers. Lietal.(2018)conductedanumericalstudyonthebucklingbehaviorofsingle-layersphericalshellstructureswithdifferentnodeconfigurations.Theirresultsshowedthatthecriticalbucklingloadwasinfluencedbythegeometricalpropertiesofthenodeconfiguration.Similarly,Liuetal.(2019)conductedastudyonthedynamicstabilityofsingle-layersphericalshellstructuresunderblastloading.Theyconcludedthatnodeconfigurationsignificantlyinfluencedthedynamicresponseofthestructures. Otherstudieshavefocusedontheoptimizationofnodeconfigurationforsingle-layersphericalshellstructures.LiandWei(2020)developedamulti-objectiveoptimizationmethodforthenodecon