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为解决电磁轨道炮导体内脉冲大电流局部聚集的问题,引入了以复杂的带状金属导体承载电流克服趋肤效应的方法。在理论分析的基础上,采用厚度变薄、边棱处倒角、附加钨护套等方法,用典型的脉宽为10 ms、幅值为2 MA的半周期正弦波激励电流,对厚度分别为40、20、15、10 mm的铜带内电流密度分布进行了仿真。仿真结果表明:1)在相同条件下,一定范围内铜带越薄,电流分布越均匀;2)边棱处倒角在一定程度上能够改善电流分布;3)铜带两侧加钨护套后可以进一步改善其电流分布状况,并得到了电流绝对均匀性系数大于73%的优化结构设计。
In order to solve the problem of the large pulse current concentrated in the electromagnetic rail gun conductor, a method to overcome the skin effect by introducing complex ribbon metal conductors into the current is introduced. On the basis of theoretical analysis, using the method of thinning the thickness, chamfering at the edge, adding tungsten sheath and so on, using the typical sine wave excitation current with 10 ms pulse width and 2 MA amplitude, The current density distribution in copper strips of 40, 20, 15 and 10 mm was simulated. The simulation results show that: 1) under the same conditions, the thinner the copper strip in a certain range, the more uniform the current distribution; 2) the chamfer at the edge can improve the current distribution to a certain extent; 3) After that, the current distribution can be further improved, and an optimized structure design with a current absolute uniformity coefficient greater than 73% has been obtained.