基于电涡流效应的引信过载脉冲幅值调节方法
Method for Adjusting the Amplitude of Fuze Overload Pulse Based on Eddy Current Effect
武志博 1孙传猛 1焦斌 1温竞龙 2辛泽洲 2汪博3
作者信息
- 1. 中北大学 电气与控制工程学院,太原 030051;中北大学 省部共建动态测试技术国家重点实验室,太原 030051
- 2. 中北大学 电气与控制工程学院,太原 030051
- 3. 中国人民解放军第四八零八工厂军械修理厂,山东 青岛 266042
- 折叠
摘要
目的 解决引信及其关键部件抗过载性能测试实验室模拟加载与实际发射差异较大的技术难题.方法 在引信被测试件底部粘贴铝贴片,并在冲击锤上缠绕励磁线圈,使其通入交变电流以产生瞬变磁场,在冲击锤靠近引信试件的过程中,铝贴片内的磁通发生变化,感应产生电涡流.涡流磁场与激励磁场相互作用,产生阻碍二者之间相对运动的电磁力,以此来实现对过载脉冲波形的调节和整定.结果 建立了激励线圈积分圆环的数学模型,推导了电涡流阻力的表达式.利用COMSOL Multiphysics软件建立了电涡流缓冲器的动力学模型,对其进行了仿真验证.在输入电流为 10 000 A时,冲击过载幅值小于 10 000g,无法满足引信抗过载模拟试验要求;当输入电流为 15 000 A时,冲击过载幅值为 15 232.9g;当输入电流为 20 000 A时,冲击过载达到 27 222.8g,冲击过载过高,容易造成试件强度失效.因此,选取输入电流为10 000～15 000 A较为合理.结论 该方法能够实现对高g值过载脉冲幅值的可控调节.
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 at-tached 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 exci-tation 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 am-plitude 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 eas-ily.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.
关键词
引信/电涡流效应/幅值调节/高g值过载/仿真验证/COMSOLKey words
fuze/eddy current effect/amplitude adjustment/high-g-value overload/simulation verification/COMSOL引用本文复制引用
基金项目
国家自然科学基金(62371425)
山西省科技创新人才团队项目(202304051001030)
山西省科技成果转化引导专项(2021104021301061)
出版年
2024
NETL
NSTL
万方数据