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对线圈炮路方法——电流丝法进行了修改,通过对激励线圈进行剖分提高了等效网络中的互感计算精度,使电流丝法能够更准确地分析线圈炮的性能。为了验证修改后电流丝法的有效性并对线圈炮的电磁暂态进行研究,将电流丝模型计算得到的激励线圈电流加载到对应的场模型中,实现对线圈炮的场路结合分析。线圈炮的场模型基于三维组合网格法建立,组合网格法使用2套网格分别离散静止和运动区域,2套网格之间没有拓扑约束从而克服了常规有限元法在处理运动导体涡流场问题时需要重剖分的麻烦。通过电流丝法改进前后场路结合法计算结果的对比可知,对激励线圈进行剖分可以提高场分析和路分析结果的一致性。提出的场路结合法使感应线圈炮的精细化分析成为可能。
The method of coil gun - current wire method was modified. By dividing the excitation coil, the calculation accuracy of mutual inductance in equivalent network is improved, and the current wire method can analyze the performance of coil gun more accurately. In order to verify the validity of the modified current wire method and to study the electromagnetic transient of the coil gun, the excitation coil current calculated by the current wire model is loaded into the corresponding field model to realize the field circuit combination analysis of the coil gun. The field model of the coil gun was established based on the three-dimensional combined grid method. The combined grid method used two sets of grids to separate the stationary and moving regions respectively. There was no topological constraint between the two grids to overcome the disadvantages of the conventional finite element method Field problems need to re-partition the trouble. By comparing the calculation results of front and back field circuit with improved method of current wire, we can see that the split of excitation coil can improve the consistency of field analysis and road analysis results. The proposed field combination method makes it possible to refine the induction coil gun.