Finite Element Analysis And Experimental Study Of Corrugated Friction Damper

With the introduction of structural passive control in the 1970 s,this theory has been widely applied and studied in the field of civil engineering.Friction damper is the most commonly used energy dissipation device,but it also has its own limitations.(2)Frictional dampers can only absorb seismic energy to the superstructure under earthquake action,but their working time is relatively short.(2)Ordinary friction dampers can only work under earthquake action.In the face of these two problems,this paper starts from the first point,puts forward the idea of how to absorb more energy in the limited time of destruction,and develops the ripple friction damper.In this paper,based on the theory of friction damper,the finite element analysis and experimental study of the ripple friction damper are carried out.(1)The components and corresponding sizes of the new type of friction damper are studied and designed.The relationship between the displacement and the output performance of the frictional damper is assumed according to the material mechanics and the Coulomb force formula under the assumption.According to the formula,The impact of the relevant factors.(2)The hysteresis curve of the ripple damper under certain conditions is obtained by the relevant tests.It is found that the area of the hysteresis curve is large,but the hysteresis curve has unstable corrugated shape,and the experiment shows that The performance increases with the increase in the pretightening force of the provided bolts,but is not a linear relationship.(3)ABAQUS is used to model and analyze the friction damper and the smooth friction damper.Because of the complexity of the model,the equivalent friction coefficient replacement method is adopted,and the finite element model of the smooth friction damper is used to define the finite element model.Finite Element Model of Triangular Serrated Edge with 0.75 mm Corrugation Friction Damper.(4)The equivalent friction coefficient is input to the frame model established by MIDAS,and the Elcent-h natural wave is loaded.By contrasting the normal displacement and the interlayer angle of the frame structure with smooth friction damper,The seismic performance of the friction damper was obtained.The results show that the ripple damper has better output performance,relatively full hysteresis curve,and has better seismic performance in finite element analysis.