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| Calculation and Analysis of Near Field Eddy Current Damping of Permanent Magnet |
| Received:June 30, 2020 Revised:July 08, 2020 |
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| DOI：10.7643/issn.1672-9242.2020.09.007 |
| KeyWord:finite element damping velocity |
| Author | Institution |
| GUO Tong |
Key Laboratory of Aeroacoustics and Dynamic Intensity Aviation Technology, China Aircraft Strength Research Institute, Xi¢an , China;School of Aeronautics, Northwestern Polytechnical University, Xi¢an , China |
| LI Bin |
School of Aeronautics, Northwestern Polytechnical University, Xi¢an , China |
| ZHANG Sheng-kun |
Wuhan Ship Development & Design Institute, Wuhan , China |
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| Abstract: |
| The work aims to investigate the influence of relative velocity on equivalent eddy current damping effect. The dynamic electromagnetic field distribution and eddy current equivalent damping effect of plunger type eddy current vibration absorber were analyzed by analytical method and finite element method respectively, and the equivalent damping effect of permanent magnet at different moving velocity was analyzed based on finite element method. The finite element method was more accurate in solving the equivalent damping of eddy current, and the relative velocity had a corresponding nonlinear influence on the equivalent damping coefficient of eddy current. According to the analytical method, the constant magnetic field does not exist in practice, and the distribution and intensity of the equivalent eddy current are highly dependent on the motion characteristics of the magnetic device. |
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