浮筏隔振系统各主要参数对系统隔振性能的影响

192JOURNALOFVIBRATIONANDSHOCKVol.19No.22000X(200030),(1)();(2)();(3);,::TB1230,,,,,,,,,,,(1)();(2)();(3);,1,,;,,;,,,,,,1.1,1,m1m2,AB,B24,35,1052114,24,72122,KAKBMAMB…KŠM([1])…KŠM,1…K=KA0000KB0000000000+KC,ŠM=MA0000MB0000000000+MC(1),KCMC1.2,X:1999-07-26,,,19641:VR=10logFRFE(2),FR;FE;;VR(dB)FR=nri=1fiR2,FE=nei=1fiE2(3):nrne,iim1,FE=1:FR=k2nri=1(x2R+x21),VR=10logk2nri=1(x2R+x21)(4),xRx1,xR=Nr=1(2r-2)ir(ibr-iar)(2r-2)2+42r2r2,x1=Nr=12rrir(ibr-iar)(2r-2)2+42r2r2(5),N,r,,rr,22.12,1,A,BCD,A101001000:(1),(2)(0-60Hz),CD,A100,,ABCD,(0-60100Hz),,(),,(3)(60-250Hz),,ABCD,,(a)(b)232.21,(ABCDE),0.010.050.21.02.0,,62000194,,,3,,,,,2.3,,,,,4B;ACDEB0.11010010000():(1),,,(2)CDE130Hz,,,2.4,,5,(),ABCD0.000.050.100.20,(a)(b)(c)10,,,,5(a),60-140Hz5(b),,160-250Hz,,,5(c),(60-200Hz),,(a)(b)(c)5,,,2.572:,6,ABC1.0E5N/m5.0E5N/m1.0E6N/m,,,,,,2.6,,1,M2120.0kg(A)10.0kg(B)1000.0kg(C)(7(a)),217(b)21.0e4N/m(A)1.0E5N/m(B)1.0E6N/m(C)(D,),,,,(a)(b)63,,(a)(b)723.1,,,,,,3.2:,,,0.41.0,,,,,,,,,,(4)8200019,,xaG,,,,[0,3.81][0,50],,,,,xaG,,c,xaG[xa-c,xa+c][G-c,G+c],,,,xaG11:0xaL0G1150xaG11:xa=2.6777m,G=1.7642,W=0.5244,:0xa1,xa2L0G11,G12,G21,G2230G11G22-G12,G210,,:xTa=[1.52293.1495]:G=8.57797.15325.49679.8538:W=0.01073,/,[3],,,,,,4/,,:a),;b),;c),,1LindbergRE,Jr,LongmanRW.OntheNumberofandPlacementofActuatorsforIndependemtModalSpaceControl.JournalofGuidance,Control,andDynamics.1984,7(2):215-2212SchulzG,HeimloldG.DislocatedActuators/SensorPositioningandFeedbackControlofFlexibleStructures.JournalofGuidance,Con2trol,andDynamics.1983,9-10,6(5):361-3673LeeAnchen,ChenST.CollocatedSensor/ActuatorPositioningandFeedbackDesignintheControlofFlexibleStructureSystem.Jour2nalofVibrationAccoustics,TransactionofASME.1994,116:146-1544RaoSS,PanTS,VenkayyaVB.Modeling,Control,andDesignofFlexibleStructures:ASurvey,AppliedMechanicsReview.1990,43(5,1):99-1175,,,/.,1998,15(1)6KirkpatrickS,GelattCD,VecchiMP.OptimizationbySimulatedAnnealing.Science.1983,220(5):671-6807ChenGS,BrunoRJ,SalamaM.OptimalPlacementofActive/pas2siveMembersinTrussStructuresUsingSimulatedAnnealing.AIAAJournal.1991,29(8):1327-13348HamernikTA,GarciaE,StechD.OptimalPlacementofDampedStrutsUsingSimulatedAnnealing.JournalofspacecraftandRock2ets.1995,32(4):653-6619.(),,:,1994(8),,,,,,3.3,,,1.::[].:,19992LiTY,etal.StructuralpowerflowanalysisforafloatingraftIsola2tionsystemconsistingofconstraineddampedbeam.JournalofSoundandVibration,1997,202(1):47-543,,..,1995(1):2-94200019JUN2000JOURNALOFVIBRATIONANDSHOCKVol.19No.22000COLLOCATEDSENSOR/ACTUATOROPTIMALPOSITIONINGANDFEEDBACKDESIGNBYSIMULATEDANNEALINGMETHODYanTianhongDuanDengpingWangJianyu(Micro-SatelliteR&DDept.,ShanghaiInstituteofTechnicalPhysics,500YuTianRoad,Shanghai200083,P.R.China)WangXuexiaoHuangWenhu(SchoolofAerospaceEngineeringandMechanics,HarbinInstituteofTechnology,Harbin150001)AbstractTheintegrateddeterminationofcollocatedsensor/actuatorslocationsandfeedbackgainviaminimizationofanenergycriterionisinvestigatedbydevelopedsimulatedannealingoptimalmethod.Theglobaloptimalvaluescanbeobtainedconvenientlybythemethod.Itsapplicationtoasimplebeamflexiblestructureconfirmstherelationshipbetweentheoptimiza2tioncriteriaandverificstheeffectivenessinvibrationcontrol.Keywords:vibrationcontrol,collocatedsensor/actuators,simulatedannealing,optimalpositioningTHEEFFECTSOFPARAMETERSOFFLOATINGRAFTISOLATIONSYSTEMONITSISOLATIONCHARACTERISTICSZhangHualiangFuZhifangQuZuqing(StateKeyLaboratoryofVibration,Shock&Noise,ShanghaiJiaoTongUniversity,Shanghai200030)AbstractThereducedfiniteelementmodelofthefloatingraftisolationsystemisestablishedtoinvestigatetheinfluenceofdifferentparameters,including:(1)massofraftframe,especiallyforthelittlemassraftframe;(2)stiffnessofraftframe,es2peciallyforthelowstiffnessraftframe;(3)dampingoftheraftframeandkindofdampers,ontheisolationcharacteristicsofthefloatingraftisolationsystem.Theresultsareofbenefittothedesignofarealfloatingraftisolationsystem.Keywords:floatingraft,finiteelementmodeling,vibrationisolationINVERSESYSTEMANALYSISBASEDOPTIMALESTIMATIONOFDYNAMICLOADSFORMULTIPLE-INPUTMULTIPLE-OUTPUTSYSTEMRaoZhushi(StateKeyLaboratoryofVibration,Shock&Noise,ShanghaiJiaoTongUniversity,1954HuaShanRoad,Shanghai200030,P.R.ofChina)ShiQinzhongIchiroHagiwara(DepartmentofMechanicalSclienceandEngineering,TokyolnstituteofTechnology,2-12-1Ookayama,Meguro,Tokyo,Japan152)AbstractAnoptimalmethodisdevelopedtoestimatethedynamicloadsforsystemssubjectedtomultipleinputs.Themethodfocusesonminimizingtheensemblemeansquareerroroftheestimation.Theinversesystemanalysistechniqueisem2ployedtoestablishtheerrorestimationequationandbyapplyingthenoncausalWienerfiteringtheory,theoptimalestimatorofdynamicloadsisderivedout.Numericalsimulationdemonstratesthatthemethodisofgoodabilityinsuppressingtheinfluenceofmeasurementnoiseonestimationaccuracy.Meanwhile,thesimulatingcalculationofloadestimationbyaconventionalmethodisalsoperformedandthecomparisonofbothresultsshowsthatthemethodproposedinthepaperisrathereffctiveandpractica2bleforbynamicloadestimation.Keywords:dynamicloadestimation,multiple