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| Method for Adjusting the Amplitude of Fuze Overload Pulse Based on Eddy Current Effect |
| Received:June 19, 2024 Revised:July 22, 2024 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2024.08.001 |
| KeyWord:fuze eddy current effect amplitude adjustment high-g-value overload simulation verification COMSOL |
| Author | Institution |
| WU Zhibo |
School of Electrical and Control Engineering,Taiyuan , China ;State Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan , China |
| SUN Chuanmeng |
School of Electrical and Control Engineering,Taiyuan , China ;State Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan , China |
| JIAO Bin |
School of Electrical and Control Engineering,Taiyuan , China ;State Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan , China |
| WEN Jinglong |
School of Electrical and Control Engineering,Taiyuan , China |
| XIN Zezhou |
School of Electrical and Control Engineering,Taiyuan , China |
| WANG Bo |
Chinese People's Liberation Army 4808 Factory Ordnance Repair Factory, Shandong Qingdao , China |
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| Abstract: |
| The work aims to solve the technical problem of significant differences between simulated loading and actual launch in the overload resistance performance testing laboratory of fuzes and their key components. An aluminum patch was attached to the bottom of the tested piece of the fuze, and the excitation coil was wrapped around the impact hammer to generate a transient magnetic field by passing alternating current. As the impact hammer approached the test piece of the fuze, the magnetic flux inside the aluminum patch changed, inducing eddy currents. The interaction between eddy current magnetic field and excitation magnetic field generated electromagnetic force that hindered the relative motion between the two, thereby achieving the adjustment and tuning of overload pulse waveform. A mathematical model of the excitation coil integral ring was established, and the expression of eddy current resistance was derived. A dynamic model of the eddy current buffer was established by COMSOL Multiphysics software and the simulation verification was conducted. When the input current was 10 000 A, the amplitude of the impulse overload was less than 10 000g, which could not meet the requirements of the fuze overload simulation test. When the input current was 15 000 A, the amplitude of the surge overload was 15 232.9g. When the input current was 20 000 A, the impact overload reached 27 222.8g. The high impact load would cause the strength failure of the tested piece easily. Therefore, selecting an input current of 10 000~15 000 A was more reasonable. This method can achieve controllable adjustment of the amplitude of high g-value overload pulses. |
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