Analysis of In-bore Magnetic and Electric Fields in Electromagnetic Railgun under Dynamic Condition

doi:10.3969/j.issn.1000-1093.2017.06.003

Abstract

Abstract: A numerical computation method is presented for the distribution characteristics of in-bore magnetic and electric fields in electromagnetic railgun under dynamic condition. The measured dynamic test data and the magnetic flux density at the breech end of the railgun are used to calculate the current densities in the armature and rails based on the magnetic diffusion equation and Ampere's law. The distribution characteristics of magnetic field and electric field of the investigated points along the central axes of the armature front end and back end are calculated. The results show that the peak magnetic flux densities of each investigated point decrease gradually with the increase in the distance from point to armature, the decay rate of the investigated point in front of the armature is much larger than that the point behind the armature. The electric field intensity of the investigated point at the muzzle is about several times of that in in-bore launching process. The proposed method can effectively calculate the induced electric field and magnetic field of railgun intelligent ammunition. The calculated results can be used in the electromagnetic shielding design of intelligent ammunition. Key

Key words: ordnancescienceandtechnology, electromagneticrailgun, currentdensity, magneticfluxdensity, electricfieldintensity

CLC Number:

YIN Qiang， ZHANG He， LI Hao-jie. Analysis of In-bore Magnetic and Electric Fields in Electromagnetic Railgun under Dynamic Condition[J]. Acta Armamentarii, 2017, 38(6): 1059-1066.

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第38卷
第6期2017 年6月兵工学报ACTA
ARMAMENTARIIVol.38No.6Jun.2017

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