| Single-side pounding tuned mass damper（SS-PTMD）is a damping device composed of a mass block,a spring and a viscoelastic material baffle,which can reduce structural vibration through collision energy consumption.Compared with the traditional tuned mass damper（TMD）,SS-PTMD has better control robustness and damping performance.Based on the SS-PTMD,a multiple single-side pounding tuned mass damper（MSS-PTMD）is proposed in this thesis.The parameter optimization and vibration reduction performance of MSS-PTMD are studied.The research contents mainly include:（1）The research status of structure vibration control at home and abroad is introduced,and the application of collision energy dissipation in dampers is described.Based on existing research,the necessity and possibility of developing from SS-PTMD to MSS-PTMD are put forward.（2）Two kinds of pounding force models that are widely used in impact dampers are introduced,and the viscoelastic impact force model considering residual deformation is selected as the basis of subsequent research.The pounding experiments determine the parameters of the pounding force model.（3）The coupled motion equation of structure with MSS-PTMD is established.Taking the minimization of the maximum dynamic amplification factor（DMF）as the optimization index,the parameters of MSS-PTMD are optimized,and the distribution law of the optimization parameters is analyzed.Simultaneously,considering the deviation of the controlled structural parameters,the variation of the vibration reduction performance of MSS-PTMD under the optimal parameters is studied.（4）The simulation analysis and experimental research were carried out to obtain the vibration reduction performance of the double single side pounding tuned mass damper（DSS-PTMD）under the condition of free vibration under the condition of tuning and different degrees of detuning.The results show that the DSS-PTMD has better vibration reduction performance than SS-PTMD under the condition of tuning and a lilltle of detuning.（5）Taking the steady-state response amplitude of structure under harmonic load as the control objective,the vibration reduction effect of DSS-PTMD under harmonic load excitation is studied by using simulation and experiment methods,and compared with SS-PTMD,the better vibration reduction performance of DSS-PTMD is demonstrated. |
