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为提供一个统一的参考标准,将不同口径电磁轨道炮的研究成果联系起来,借鉴传统火炮内弹道研究方法,通过描述电磁轨道炮发射过程微分方程组,以及电枢与轨道电磁力解析分析,分别从宏观层面和微观层面考察了电磁轨道炮的内弹道过程。结果表明,电磁轨道炮的电磁场、应力场和温度场不由电流大小或口径大小单独决定,而是有由它们的比值即电流线密度决定。电流线密度平方与轨道压力、弹底压力、轨道间磁压力、轨道温度成正比,电流线密度可以反映电磁轨道炮的内膛压力大小。提出以电流线密度作为电磁轨道炮的核心参数,且比照传统火炮内弹道学参数的命名,电流线密度可以看作是电磁轨道炮的“膛压”。对大、小口径电磁轨道炮发射过程模拟计算对比表明,以电流线密度作为表征量,可以有效联系起不同口径电磁轨道发射装置上相关参数的变化规律。
In order to provide a unified reference standard, the research results of electromagnetic caliber guns of different caliber are linked, and the traditional interior ballistic research method of artillery is used. By describing the differential equations of electromagnetic gun launching process and analyzing the electromagnetic force of armature and orbit, The internal ballistic trajectory of the electromagnetic rail gun was investigated from macro and micro level. The results show that the electromagnetic rail gun electromagnetic field, stress field and temperature field is not determined by the size of the current or the size of the aperture alone, but by their ratio that the current density of the line. The square of the current density is proportional to the pressure of the rail, the pressure at the bottom of the bomb, the magnetic pressure between the tracks and the temperature of the track. The current density can reflect the pressure of the bore of the electromagnetic rail gun. The paper presents the current density as the core parameter of the electromagnetic rail gun, and compared with the nomenclature of the traditional ballistic ballistic parameters, the current density can be regarded as the “rail pressure” of the electromagnetic rail gun. The simulation calculation of the large and small diameter electromagnetic rail gun launching process shows that the variation of the relevant parameters on the electromagnetic track launchers with different diameters can be effectively linked by taking the current density as the characterization quantity.