Experimental Investigation Into The Vibration Control Effects Of Pounding Tuned Rotary Mass Damper

From the perspective of the development of recent society,it is of great significance to carry out seismic design and seismic research on the structure of buildings,whether from the viewpoint of people's life safety or economic property.Among many vibration control methods,the passive control technology is a hot research direction in vibration control for its simple structure,convenient installation and no need of external energy,and the damper is one of the most promising applications.The Pounding Tuned Rotary Mass Damper(PTRMD)presented in this paper is a new type of energy dissipation damper,but it can be used to control more kinds of vibration conditions as well as other dampers.The damper is based on the Tuned Rotary Mass Damper(TRMD)and introduces a limit collision mechanism,which not only maintains the characteristic of the Tuned Mass Damping of the traditional tuned mass damper(TMD),but also attaches the collision energy dissipation mechanism of the Impact Damper.In this paper,the PTRMD system is analyzed by means of experimental researches,the main contents of which include the following three aspects:The first is the analysis of the damping performance of the PTRMD system: Based on the current TRMD device,a set of PTRMD system test model is developed,and we use seismic simulating shaking table to do the dynamic response analysis of the damper system under free vibration,harmonic excitation and simulated seismic wave excitation.The displacement response and acceleration response of the top of the main structure are collected by the laser displacement meter and the acceleration sensor respectively.The research implies that the main structure with PTRMD can obtain good damping effect in different working conditions(including the amplitude of displacement response at the top of the model,the root-mean-square(RMS)of the displacement response,the amplitude of acceleration response and the mean square root of the acceleration response),in which the response RMS shows the best damping control effect.The second is the parameter analysis of the PTRMD system: The two important parameters,the quality ratio of the oscillator and the collision wall spacing in the PTRMD device are studied,and three working conditions are set up to test and analyze.The results show that the device with large mass and large collision wall spacing has better damping control effect under free vibration condition,the damper device of this parameter has better vibration control effect than other parameters in the harmonic excitation near the resonant frequency,but its influence on the frequency change of external excitation response is more sensitive;It is found that the control effect of dynamic response amplitude increases with the increase of mass ratio,while the control effect of the response RMS is decreased when the mass ratio of the roller oscillator of the damper changes in a certain range;Both the amplitude response and the meansquare-root response are better than those with small spacing in the working conditions with large collision spacing.The third is the comparative test analysis of PTRMD and Ball Impact Damper(BID): The mass ratio of the two dampers and the horizontal projection spacing of the limit impact wall are set to be equal,and the shaking table tests are carried out under different operating conditions respectively.The experimental results show that the damping performance of PTRMD is higher than that of BID in the condition of free vibration,harmonic excitation or simulated seismic wave,and the control effect of PTRMD system on acceleration is more stable.Lastly,the PRTMD system was simulated by SolidWorks,and the simulation results were compared with the experimental results to show the effectiveness of the numerical simulation.