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1、蜂窝结构缓冲装置的优化设计———尹汉锋暋文桂林暋马传帅等蜂窝结构缓冲装置的优化设计尹汉锋1,21,21,21,2暋文桂林暋马传帅暋韩汪利1.湖南大学汽车车身先进设计制造国家重点实验室,长沙,4100822.湖南大学特种装备先进设计技术与仿真教育部重点实验室,长沙,410082摘要:通过简化蜂窝结构轴向压缩的应力–应变曲线,得到了理想的蜂窝结构轴向压缩应力–应变曲线,在该理想曲线的基础上对蜂窝缓冲装置的吸能大小和缓冲力峰值进行了理论计算。为了设计出单位质量吸能量大且缓冲过载小的蜂窝缓冲装置,对蜂窝结构的胞元
2、胞壁厚、胞壁长进行了多目标优化,根据优化结果计算出缓冲蜂窝的最小轴向长度。应用该方法对四支撑腿着陆器中的蜂窝缓冲装置进行了优化设计,并采用试验验证过的Adams多刚体力学模型对优化结果进行了仿真计算,仿真结果表明该优化设计方法能很好地指导着陆器缓冲装置的设计。该方法不仅可以减少试验次数和降低昂贵的试验成本,而且通过多目标优化设计还可以一次满足不同缓冲级别的过载要求。关键词:蜂窝结构;缓冲装置;快速非支配排序遗传算法;优化设计中图分类号:TB535.1暋暋暋文章编号:1004—132X(2011)10—11
3、53—06OptimizationDesignofCushionInstrumentofHoneycombStructure1,21,21,21,2YinHanfeng暋WenGuilin暋MaChuanshuai暋HanWangli1.StateKeyLaboratoryofAdvancedDesignandManufactureforVehicleBody,HunanUniversity,Changsha,4100822.theKeyLaboratoryofAdvancedDesignandSimul
4、ationTechniquesforSpecialEquipment,MinistryofEducation,HunanUniversity,Changsha,410082Abstract:Aftersimplifyingthecrushingstrain-stresscurveofhoneycombstructureunderaxialloading,anidealcrushingstrain-stresscurvewasobtained.Basedontheidealcrushingstrain-st
5、resscurve,theenergyabsorbedbythecushioninstrumentofhoneycombstructureandthepeakcrushingforcewerecalculated.Inordertodesignacushioninstrumentofhoneycombstructurethathasthebiggestenergyabsorptioncapacityperunitmassandhastheminimumcushionoverload,acellwallth
6、icknessandwidthofthehoneycombstructurewereoptimizedbyusingmulti-objectiveoptimizationmethod.Accordingtotheoptimizationresults,theminimumaxiallengthofthehoneycombstructurecanbecalculated.Then,thehoneycombcushioninstrumentinstalledinthefourleggedlanderwasop
7、timizedusingthismethod.Theoptimizationresultswereverifiedbyemployingthemulti-bodydynamicsmodelestablishedinAdamssoftware.Thesimulationresultsindicatethatthisoptimizationmethodcandirectthedesignofthelandinginstrumentverywell.Thismethodcanreducethetimesandt
8、hecostofthetests,andmeetsthecushiondemandsofdifferentoverloads.Keywords:honeycombstructure;cushioninstrument;non-dominatedsortinggeneticalgorithm栻(NSGA-栻);optimizationdesign0暋引言越来越多地应用在航空航天、汽车以及国防装备蜂窝材料以其吸能特性稳定和结构质量
