The Coupled Analysis On The Series Primary And Secondary Systems As Well As The Research On The Seismic Isolations Of The Systems

Taking the primary and secondary system as the object, based on the coupledanalyzing for the system, the method for analyzing the dynamical response is showedin the paper under the guidance of the existing dynamical method, which has thecharacteristic of simple calculation theory and less calculation. Also, the calculation ofthe established practices and procedures is approximately accord with the practicalvibration effect. Then find out the factors that affect dynamical response of thesystem’s two parts. Finally propose the rational and feasible isolation technology forthe secondary systems according to isolation theory. For this reason, the content in thepaper involves the following parts:1、The concept and category of the secondary systems, physical properties and theacquired dynamical behaviors are simply showed in the paper, which all refer to agreat account of referred literatures. The principle and method about isolationtechnology are also mentioned in the paper.2、Based on the target that error reduction and less computation, make sure thedynamical analyzing theory the paper refers to through comparing the numericalmethods with each other. The derivation and the computational process are showedone after another. And then the model the paper is related to is established by analysisof model in references. Finally, the matrices for analyzing the dynamical response ofsystems are derived thanks to the structural dynamics and structural static mechanic,which are separately the coupled analyzing mass matrix, the coupled analyzingdamping matrix as well as the coupled analyzing stiffness matrix.3、Based on the certain theory for dynamical computation and the derivedmatrices, write the program for analyzing dynamical response according to rule of thecomputer language FORTRAN. The result the program work out is verified. Then, theinfluential laws that the physical parameters which include the mass of the secondarysystem as well as the layer that the secondary structure lies on respectively have effecton maximum relative displacement and maximum absolute acceleration of the everypart of systems are analyzed in condition that the attached system and the primarysystem are in resonance or not. The law that the layer which the secondary structurelies on has effect on the maximum relative displacement of the primary structure’svery floor is found out. Also, the law that the damping of the secondary systeminfluences dynamical response of the two parts of the system. Additionally, comparingthe result got by way of the traditional floor response spectrum with the result got bythe coupled analyzing the system, the reliability of the system’s dynamical response got by the former method is analyzed in the paper.4、The isolation methods for secondary system are present according to theprinciple and method about isolation, which are distinguish the base isolation and theattached structure lies on the secondary system. Then derive the coupled analyzingmatrices and write the corresponding programs when the secondary structure isisolated. In addition, analyze the effectiveness about the two methods and estimate theeffect about the some parameters of isolation equipments. At last, taking the methodthat by means of the primary system being isolated in account, find out the effectiveand rational measure for the secondary system’s isolation.The coupled analyzing matrices of the primary and secondary systems in thepaper provide significant foundation for doing further research on dynamical responseof the systems. Also, the law that every physical parameter of the attached systemsimpress on primary system provide important reference for seismic resistance ofsecondary system.