A Research On A Novel Nonlinear Eddy Current TMD For Vibration R Eduction Of Pedestrian Bridge

The phenomenon of structural vibration generally exists in engineering,and reasons are different.It can affect the structural performance and therefore has always been the attention.At the same time,research on vibration control has been going on all the time.At the present stage,the research on vibration control of pedestrian bridge is not enough.The vibration reduction system can’t adapt to frequency vibration which is large bandwidth and change frequently.It causes frequent accidents of pedestrian bridge and affects people’s lives.Based on the research on vibration reduction of pedestrian bridge,and TMD system is chosen as the research object in this paper.Although it’s more about the research on vibration reduction performance of linear TMD,there is still more research space for nonlinear stiffness and nonlinear damping of TMD.This paper attempts to design and optimize a new type of TMD which is more suitable for solving the problems of pedestrian bridge.This paper achieved to improve nonlinear variation and precise adjusta ble size of TMD damping via eddy current device to provide damping and t hrough remake of eddy current device.After the design is completed,we te sted vibration reduction ability of a new type of TMD by MATLAB which ta ke the aerobridge of Beijing New Airport for instance.The conclusions are obtained that the frequency bandwidth of the nonlinear damping TMD is obviously larger than that of the linear TMD and so on.In order to verify the simulation conclusion and enhance its reliability,this paper designs and carries out a model test based on the theory of model test and the data of engineering examples.A new type o TMD production is manufactured and function is tested,including vibration reduction.While validating the simulation results,some new problems are also explored and studied.At the end of the study,we have discussed some of the phenomena and problems which should be explored,as well as the aspects which should be optimized in simulation and experiment.