Study on Characteristic and Optimization of Eddy Current Damper Under Impact Load

To investigate the damping force characteristics of an eddy current damper under the impact load, a permanent magnet eddy current damper model is proposed, and a dynamic model of the moving part under the impact load is created. Furthermore, the finite element approach is used to analyze the dynamic properties of damping force under different structural parameters. Taking the minimum fluctuation of damping force and the minimum volume of damper as the optimization objectives, the objective function is established and the boundary conditions are determined. The Non-dominated Sorting Genetic Algorithm II (NSGA-II) is utilized to maximize the research during the procedure. The results demonstrate that structural elements such as the pair equivalent air gap thickness and conductivity of the conductor tube have significant effects on the damping force. After optimization, the volume of the damper is noticeably lower, the regular curve of the resistance under the impact load is smoother and flatter, and the control effect of the damping force is obvious, which can effectively avoid the saddle-shaped curve of the traditional damper. The research findings contain specified reference values for better damping force control under high impact loads and boosting equipment performance.