5_赵根浩_振动基础设计43

,|,01020304ANALYSISEXAMPLE,01,-+-=+,-,?,?,?,-,-,-,:,:,:,:(Yes6,No3):,-,-,-,u=ecostv=esint(:,t:),(RotatingMachine),?,au=-e2costav=-e2sintF=ma=me2,=/()=dynamicforceamplitude(zero-to-peak)(N)=rotatingmass(kg)=masseccentricity(mm)=circularoperatingfrequencyofthemachine(rad/s)=servicefactor,usedtoaccountforincreasedunbalancedduringtheservicelifeofthemachine,?,1.2.3.4.5.6.7.8.,9.etc.,?,=/,?,(dynamicamplificationfactor),-,=/,?,(Transmissibility),-,?,1.23,35300mm600mm,1/52.()1.52.5,2.54.03.(ElevatedFrameType)0.1045L4/3,L:(m)=(+)0.61.5m,-(TrialSizing),.,-50%-75%,?,02,Atypicalconcreteblockisregardedasrigidascomparedtothesoiloverwhichitrests.Therefore,itmaybeassumedthatitundergoesonlyrigid-bodydisplacementsandrotations.Undertheactionofunbalancedforces,therigidblockmaythusundergodisplacementsandoscillationsasfollows.1.translationalongZaxis2.translationalongXaxis3.translationalongYaxis4.rotationaboutZaxis5.rotationaboutXaxis6.rotationaboutYaxis,SpringConstants,SpringConstants&DampingRatio,DampingRatio,SpringConstants&DampingRatio,24,?,MIDAS_GEN,03,Spring&DampingFactor,VerticalSpringConstant,Fixed-tipconcretepiles(),Relaxed-tipconcretepiles(),Spring&DampingConstantofSinglePile,Kz1=(EpA/r0)f18,1Cz1=(EpA/Vs)f18,2,PileGroups,VerticalSpringConstant,Kzg=Kz1/ATotalKz=Kzg+KzfCzg=Cz1/ATotalCz=Czg+CzfN:NumberofpilesingroupA:Axialdisplacementinteractionfactorforatypicalreferencepileinthegrouprelativetoitselfandtoalotherpilesinthegroup,assumingthereferencepileandallotherpilescarrythesameload.,PileGroups,VerticalSpringConstant,Page83,Page86,D=cz/(2(mkz)=cz()/(2(mk)cz=c/,PileGroups,HorizontalSpringConstant,Kxg=Kx1/LTotalKx=Kxg+KxfCxg=Cx1/LTotalCx=Cxg+CxfN:NumberofpilesingroupL:adisplacementinteractionfactorforlateralmotiondefinedinananalogousfashiontoA,Kx1=(EpI/r03)f11,1Cx1=(EpI/r02Vs)f11,2,Spring&DampingConstantofSinglePile,UncoupledSpring&DampingConstantofSinglePile,RockingSpringConstant,K1=(EpI/r0)f7,1C1=(EpI/Vs)f7,2,1,1,2,CoupledSpring&DampingConstantofSinglePile,Kx1=(EpI/r02)f9,1Cx1=(EpI/r0Vs)f9,2,2,04ANALYSISEXAMPLE,(1)SPREADFOUNDATION,Model,StaticAnalysis,AppliedLoading,StaticAnalysis,SectionDesign,DynamicAnalysis,Modeling&AdditionalMass,DynamicLoad,TimeHistoryLoad,ResonanceCheck,DisplacementCheck,04ANALYSISEXAMPLE,(2)PILEFOUNDATION,StaticAnalysis,Modeling,StaticAnalysis,AppliedLoading,1.MachineDeadLoad,2.LiveLoad,3.NormalOperatingTorqueLoad,4.CondenserOperatingLoad,StaticAnalysis,SectionDesign,Mu,Vu,Ms,DynamicAnalysis,Modeling&AdditionalMass,DynamicAnalysis,TimeHistoryLoadTimeVaryingStaticLoad,DynamicAnalysisPileGroups,AxialDisplacementinteractionfactor,S/2ro=3.0PoissonsRatio=0.32L/2ro=21.25,DynamicAnalysisPileGroups,AxialDisplacementinteractionfactor,Referencepile,Pilecoordinateinput,Sum,Average,DynamicAnalysisPileGroups,LateralDisplacementinteractionfactor,DynamicAnalysisPileGroups,Lateral_xDisplacementinteractionfactor,Referencepile,Pilecoordinateinput,Sum,Average,DynamicAnalysisPileGroups,Lateral_yDisplacementinteractionfactor,Referencepile,Pilecoordinateinput,Sum,Average,DynamicAnalysis,Eigen-ValueAnalysis,1stMODE,2ndMODE,DynamicAnalysis,VelocityCheck,VE,(CFD),Fields,Fields,Fields,Fields,POWERBLOCK-,-,-(CWP),-SILO,SHED,TransferTower,ConveyorSupportYARD-,SwitchYard-(,),-