摘要
为了研究电磁发射装置的损耗与温升特性,基于COMSOL 有限元仿真软件建立了电磁发射装置的动态计算模型,并用有限元方法模拟了电磁发射装置损耗和温度分布的时空演变过程.仿真结果表明:发射过程中电枢会产生熔化现象,导轨和电枢发生接触的内侧,尤其是靠近棱线部分的导轨温升较大.通过该模型建立了激励源大小、导轨材料、导轨结构、导轨尺寸与温度变化的关系,为电磁发射装置热管理提供了参考.
Abstract
In order to study the loss and temperature rise characteristics of the electromagnetic laun-cher,a dynamic calculation model of the electromagnetic launcher was established based on COMSOL finite element simulation software,and the space-time evolution process of the loss and temperature distribution of electromagnetic launcher was simulated by finite element method.The simulation re-sults showed that the armature would melt during the launching process,and the part of the rail in contact with the armature,especially the part near the edge,underwent a larger temperature rise.The relationship between the size of the excitation source,rail material,rail structure,rail size,and tem-perature variation was established by the proposed model,which provided a reference for the thermal management of electromagnetic launchers.
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