Research On Vibration Reduction Performance Of Tuned Electromagnetic Inertia Damper

In civil engineering related industries,people tend to pay attention to the problems related to vibration in building structures.The vibration amplitude of a building structure will affect the comfort and stability of the whole structure if it exceeds a certain limit,and even damage the structure directly if the amplitude is too large,causing casualties and property damage.Based on the above social needs,the vibration control technology and theory of civil structure has been developed and improved day by day,but the traditional dampers such as tuned mass dampers are generally only damped by mechanical energy dissipation.The electromagnetic unit composed of coils and magnets can generate electromagnetic damping force and current during motion,and the inertia mass can provide virtual mass for the damper with negative stiffness effect.In this paper,the mass unit in the tuned mass damper is replaced by an inertial mass unit,and the viscous damping unit is replaced by an electromagnetic damping unit to form a new electromagnetic tuned inertial mass damper(Electromagnetic Tuned Inerter Damper,ETID).In view of the structural characteristics of ETID,the simulation analysis of parameter optimization and damping performance is carried out in this paper,and the main contents include the following.(1)Briefly introduced the development history of vibration control of civil structures,summarized the research status of passive control,active control and semi-active control,and reviewed the concept and development process of tuned mass dampers,inertial mass and electromagnetic dampers.(2)Compares the damping performance of classical TMD and EMID,and seismic table tests are conducted on EMID to investigate the influence of key parameters on the damping performance of EMID.(3)A single-degree-of-freedom structural coupled dynamics model of an electro-magnetically tuned inertial damper was established based on Newton’s law,and then the relevant parameters were parametrically optimized by a particle swarm algorithm.Robustness analysis was carried out,and the damping performance of the ETID under seismic excitation was analyzed using the obtained optimized parameters.(4)The mechanical model of the coupled system of ETID and single-degree-of-freedom structure under semi-active control is established,and the structure is controlled by different semi-active control methods,and the structural parameters are optimally designed and compared with the damping performance of ETID under passive control.(5)Summarizes the research contents of the article,the shortcomings and the prospects for future research.