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1、摘要结果表明传统优化的结果不满足可靠性要求，非概率可靠性优化的结果满足可靠性要求且有效减小了主梁结构的体积。本文基于响应面模型，考虑到结构参数的不确定性，对起重机主梁结构进行非概率可靠性优化，所述方法对于含不确定参数的复杂结构的优化设计具有一定的参考价值和意义。关键词：起重机；不确定性；非概率可靠性；响应面法；优化设计II万方数据AbstractAbstractCraneisusedtoreducephysicallabor,improveworkingefficiencyandrealizesafeproductionasanaux
2、iliaryequipmentandwidelyusedinmachinerymanufacturing,ports,construction,transportationandotherareasofproduction.Cranemetalstructureisanimportantpartofliftingequipment,whichisusedtoinheritandpassworkloadandnaturalload.Sothedesignofcranemetalstructurehasagreateffectonthem
3、echanicalperformance.Traditionalcranestructureoptimizationdesignisbasedonthedeterministic,structureparametershavecertainuncertaintyinpracticalengineering,whichmaycausethecranedoesnotmeetthedesignrequirements.probabilisticreliabilitytheorycandealwiththeuncertainty,butitn
4、eedsenoughdatestodescribetheprobabilitydistributionoftheuncertainparameters,sometimesitisdifficulttoobtain.Non-probabilisticreliabilityconvextheorydescribestheuncertainparameterswithintervalmodel,itonlygettheboundaryoftheparametersandhassimplestructureandstrongapplicabi
5、lity.Basedonreliabilityanalysisofintervalmodel,thelimitationstatefunctionforcranestructureisdifficulttoobtaindirectly.Astructuraloptimizationmethodbasedonresponsesurfacemodelandnon-probabilisticreliabilityanalysisispresentedandthecranestructureisoptimizedforitsminimumvo
6、lumeinthispaper.Firstly,basedonthebasictheoryoftheresponsesurface,quadraticpolynomialisadoptedtoreplaceapproximatelythelimitationstatefunctionofthestructure,thenusingellipsoidmodelandintervalmodeltoevaluatenon-probabilisticreliabilityoftheexamplestructure,finallynon-pro
7、babilisticreliabilityindexbasedontworeliabilitymodelsisanalyzedandcompared,whichrevealtheirdifferenceandinterrelation.Secondly,thenon-probabilityreliabilityoptimizationisanestedoptimizationproblem,outerloopistooptimizethetargetfunctionofstructuralperformance,whichsatisf
8、ythenon-probabilityreliabilityindex;innerloopisaIII万方数据Abstractmin-maxproblemassociatedwithevaluationofthereli
