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10000 A时,冲击过载幅值小于10000g,无法满足引信抗过载模拟试验要求;当输入电流为15000 A时,冲击过载幅值为15232.9g;当输入电流为20000 A时,冲击过载达到27222.8g,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10000~15000 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。
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 10000 A,the amplitude of the impulse overload was less than 10000g,which could not meet the requirements of the fuze overload simulation test.When the input current was 15000 A,the amplitude of the surge overload was 15232.9g.When the input current was 20000 A,the impact overload reached 27222.8g.The high impact load would cause the strength failure of the tested piece easily.Therefore,selecting an input current of 10000~15000 A was more reasonable.This method can achieve controllable adjustment of the amplitude of high g-value overload pulses.
作者
武志博
孙传猛
焦斌
温竞龙
辛泽洲
汪博
WU Zhibo;SUN Chuanmeng;JIAO Bin;WEN Jinglong;XIN Zezhou;WANG Bo(School of Electrical and Control Engineering,North University of China,Taiyuan 030051,China;State Key Laboratory of Dynamic Measurement Technology,North University of China,Taiyuan 030051,China;Chinese People's Liberation Army 4808 Factory Ordnance Repair Factory,Shandong Qingdao 266042,China)
出处
《装备环境工程》
CAS
2024年第8期1-8,共8页
Equipment Environmental Engineering
基金
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)。
关键词
引信
电涡流效应
幅值调节
高g值过载
仿真验证
COMSOL
fuze
eddy current effect
amplitude adjustment
high-g-value overload
simulation verification
COMSOL
