In order to study the magnetic field characteristics of eddy current damper under impact load,the permanent magnet eddy cur-rent damper model and equivalent magnetic circuit model are established,and the relationship between magnetic field intensity and structural parameters at air gap is analyzed.the static and dynamic magnetic field and eddy current field characteristics of eddy current damper under impact load are studied by finite element method.It is found that the static magnetic field of the eddy current damper is"several"shape and array distribution,and the eddy current produced by the next stage of the impact load will interact with the static magnetic field to form a"several"dynamic working magnetic field,and the change has a certain relationship with the impact load on the damper.The research results of this paper have a certain reference value for improving the control of eddy current damping force under impact load.
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