Dynamic Behavior of High Performance Lightweight Structures with Composite-Embedded Actuators，2005年新型纤维与聚合物材料国际学术会议（10.19-10.21，上海）-中国聚合物网,论文下载

Dynamic Behavior of High Performance Lightweight Structures with Composite-Embedded Actuators

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Dynamic Behavior of High Performance Lightweight Structures

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分子表征

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2005年新型纤维与聚合物材料国际学术会议（10.19-10.21，上海）

简介：

Activeloadandshapecontrolaswellasactivevibrationcontrolincreasinglycometotheforewithinawiderangeoflightweightstructureslikee.g.invehicles,machinesandsportsgoodsduetorisingdemandsoncomfortandenvironmentalcompatibility.Material-integratedpiezo-ceramicmodulesincombinationwithanoptimalutilizationoftheanisotropicdynamicmaterialcharacteristicsoffiber-reinforcedcompositesallowheretomakeanessentialcontributiontoobtainhigher“active”compositedampingandsignificantlyreducedsoundradiation.Dynamicallyloadedhighperformancecompositestructureswiththeirhighsensitivitytolargevibrationamplitudescanachieveahighstructural-dynamiclightweightpotentialbytheuseofsuchcomposite-embeddedactuators.Furthermore,itispossibletoincludetheactivelyinfluencedstructure-bornenoisebehaviorofcompositesasanadditionalconstructionfeaturealreadyduringthematerialselectionwithintheconceptdevelopmentstate.Suchactivestructuraldynamicdesignconceptspreventtheinevitableincreaseofmassbysecondary“passive”measureslikeelasticbearingsandadditionalsoundinsulatingfoils.Anecessarypreconditionfortheeffectiveuseofactivefiber-reinforcedstructuresisamaterial-adapteddynamicanalysisinordertounderstandthecomplicatedcoherencesbetweencompositedamping,structuralvibrationsandthepiezo-effect.Therefor,thevibrationanddampingbehaviorofthe“passive”compositestructureshastobecoupledwiththepiezo-electricfieldsbyphysicallybasedsimulationmodels.AdvancedanalyticalandnumericalstructuraldynamicsimulationmethodsweredevelopedattheILK,whichallowtoconsidernotonly“passive”materialparameterfunctionslikedirectionalstiffnessanddampingbutalsoactor-specificvariableslikeactor-positionand-sizewithinthedesignprocess.Theseefficientcalculationmethodswereusedtoperformdetailedparameterstudiesofe.g.anisotropicmultilayeredcompositeplates.Theresultsclearlyrevealthephysicallybasedcoherencesbetweenthemanifoldpassiveandactivedesignvariablesandthereforemakeacontributiontoamaterial-adapteddevelopmentofstructuraldynamicandacousticallytailoredactiveanisotropicfiber-reinforcedcompositesforhighperformancelightweightapplications.

作者：

W. Hufenbach O. T&auml；ger L. Kroll M. Dannemann

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2007-08-08 17:52:42

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