主動約束層阻尼結(jié)構(gòu)的振動控制研究.pdf

1、重慶大學(xué)碩士學(xué)位論文主動約束層阻尼結(jié)構(gòu)的振動控制研究姓名：王宜申請學(xué)位級別：碩士專業(yè)：車輛工程指導(dǎo)教師：鄭玲201005重慶大學(xué)碩士學(xué)位論文英文摘要IIABSTRACTActiveConstrainedLayerDamping(ACLD)treatmentsarethattheuncontrolledconstrainedlayerofpassiveconstrainedlayerdampingisreplacedbycontrolle

2、dpiezoelectricmaterial.Thesheardefmationofviscoelasticmaterialscanbecontrolledactivelyindertoenhanceenergydissipationofvibration.ACLDisatypicalhybridstrategyofactivepassivevibrationcontrol.Itcombinestheadvantagesofactive

3、controlpassivedampingrevealsgreatpotentialapplicationsonstructurevibrationcontrol.InthispaperafiniteelementmodelisdevelopedtodescribepredictthevibrationacteristicsofthestructurestreatedwithACLDtreatments.Theresearchofvib

4、rationcontrolaboutthestructurestreatedwithACLDtreatmentsispresented.Thecontentsofthepaperareexpressedasfollows:①AfiniteelementdynamicmodelfthestructureswithACLDtreatmentsisderivedbasedontheconstitutiveequationsofelasticv

5、iscoelasticpiezoelectricmaterialsbyapplicationofHamiltonprinciplevirtualwkprinciple.ThedynamicsanalysisofthestructurestreatedwithACLDtreatmentsisresearched.ComparisonbetweentheresultsofFEnumericalmodelANSYSsoftwareverifi

6、esthecrectnessofdynamicmodelinthispaper.②Theclosedloopcontrolsystemconsideringdisplacementvelocityfeedbackofselfsensingvoltagefromsenslayerisdeveloped.ThedynamicbehavisofACLDstructuresincludingnaturefrequencieslossfactsr

7、esponsesinfrequencydomainareinvestigated.Theinfluenceofcontrollergainsonvibrationsuppressionisdiscussed.Thepeakpointsofvibrationaremovedwithproptionalcontrollergainsbuttheyarenotchangedwithdifferentialcontrollergains.The

8、effectofderivativecontrolisbetterthanproptionalcontrol.③TheeffectsofseveralkeyparameterssuchaslocationcoverageofACLDtreatmentsthicknessofviscoelasticmaterialsonvibrationsuppressionofcylindricalshellswithACLDtreatmentisal

9、sodiscussed.WhendifferentmodeshapesarefocusedonanoptimalplacementofACLDtreatmentshouldbeadopted.④TheexperimentalmodalanalysisofACLDplatesiscarriedon.Testingthemodeacteristicsofbaseplateverifiesthecrectnessofdynamicmodel.