基于正交建模的空间柔顺构件多目标优化-论文.pdf

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1、Jou浙rnalof江Zhejia大ngUn学iversit学y(En报gine(e工ring学S版cien)ce)V01．46NO．8第46卷第8期Aug．20122012年8月DOI：10．3785／j．issn．1008—973X．2012．08．010基于正交建模的空间柔顺构件多目标优化张雷，邬义杰，王彬，刘孝亮(浙江大学流体动力与机电系统国家重点实验室，现代制造工程研究所，浙江，杭州310027)摘要：为满足超磁致伸缩材料精密加工异形孔的刚性、稳定性等要求，根据材料驱动特性对空间柔顺构件多个性能参数(驱动刚度、抗扭转刚度和一阶固有频率)进行优化设计，给出一种基于正交仿

2、真试验和遗传算法的多目标优化方法．该方法通过主结构离散参数值的正交排列组合和有限元仿真获得两者的映射试验表，再采用回归拟合的方法建立各性能参数与主要结构参数的优化模型，经多目标遗传算法获得一组最优解，使柔顺构件弯曲变形量、扭转变形量、一阶固有频率分别为51．6um、3．3uiYl、849．7Hz，满足超磁致伸缩驱动特性和异形孑L精密加工的要求．关键词：超磁致伸缩；空间柔顺构件；正交有限元仿真；逐步回归拟合；多目标遗传算法中国分类号：TP271文献标志码：A文章编号：1008—973X(2012)08—1419—05Multi-objectiveoptimizationmetho

3、dofspatialflexible—componentbasedonorthogonaltestsZHANGLei，WUYi—jie，WANGBin，LIUXiao—liang(TheStateKeyLaboratoryofFluidPowerTransmissionandControl，InstituteofModernManufactureEngineering，ZhejiangUniversity，Hangzhou310027)Abstract：Tosatisfytherigidity，stabilityandotherrequirementsofnon—cylinde

4、rpinholesprecisionmachiningbythespatialflexible—componentsandgiantmagnetostrictivematerial(GMM)，thedrivencharacteristicsofGMMandmulti—objectiveoptimizationofitsperformanceswerestudied，suchasthedrivingstiffness，torsionalstiffnessandfirstnaturalfrequency．Thenthemainstructuralparametersofspatia

5、lflexible—componentswereanalyzedwhichcaninfluenceeachperformances，andakindofmulti—objectiveoptimizationmethodsofflexible—componentsweregivenbasedonorthogonaltest，finiteelementsimulationandgeneticalgorithm．Andthroughtheorthogonalpermutationandcombinationofthediscretevaluesofmainstructuralpara

6、meters，thengetamappingtesttablewithfiniteelementsimulations．Aftereachperformanceparametersandthemainstructuralparametersoptimizationmodelswerebuildbyregressionfittingmethod．Themulti—objectiveofspatialflexible—componentperformanceswereoptimizedbythemulti—objectivegeneticalgorithm．Thenagroupof

7、optimalsolutionofmainstructuralparametersweregot，andthebendingdeformationreached51．6urn，thetorsionaldeformationwas3．3um。andfirstnaturalfrequencywas849．7Hz，whichallmetthedrivencharacteristicsofGMMandbasicrequirementsofnon—cylinderpinholespreciselyma