同步感应线圈发射器多物理场直接耦合分析

Multi-physics fields direct coupling analysis of synchronous induction coil launcher

为了优化电枢结构性能,基于装备应用需求开展了多级同步感应线圈发射器电磁-结构-温度多物理场直接耦合分析研究。首先,基于电磁场理论推导了同步感应线圈发射器多物理场耦合方程和有限元-边界元方法求解过程;然后,利用LS-DYNA软件进行了三级同步感应线圈发射器多物理场直接耦合分析,并完成了套筒电枢发射分析;最后,得到了同步感应线圈发射器发射过程中电磁力、应力和温度随发射时间和空间结构变化规律,即电磁力、应力和温度集中在电枢尾部区域,且随发射时间逐步向前端和向内层扩散,在电枢前端内层区域,电磁力占比小于0.1%,故在兼顾发射性能和结构性能的前提下,电枢头部厚度可明显减小。

Aiming at the optimization of armature structure performance,based on the application requirements of equipment,the multi-physics direct coupling analysis of electromagnetic,structure and temperature of multi-stage synchronous induction coil launcher was carried out.Firstly,based on electromagnetic field theory,the multi-physics coupling equation of synchronous induction coil launcher and the process of FEM-BEM method were derived.Secondly,LS-DYNA software was used to set up the multi-physics direct coupling analysis process of the three-stage synchronous induction coil laun-cher,and the sleeve armature emission analysis was completed.Finally,the variation rules of electromagnetic force,stress and temperature with time and space structure in the launching process of synchronous induction coil launcher were obtained.The results show that the electromagnetic force,stress and temperature are concentrated in the tail region of the armature and gradually diffusing inside and forward with the launch time.In addition,the electromagnetic force proportion in the interior layer of the front armature is less than 0.1%,and the thickness of the armature head can be reduced considering the launch performance and structure.