Research on Contact Characteristics of Armature and Rail in Augmented Electromagnetic Railgun

doi:10.3969/j.issn.1000-1093.2018.03.005

Abstract

Abstract: In order to explore the contact characteristics of armature and rail in augmented electromagnetic railgun, the muzzle voltage, rail current, armature velocity and displacement are obtained by actual launching test. Taking the mechanical structure parameters of launcher into account, a mathematical model among contact resistance, muzzle voltage, rail current, armature speed and displacement is established based on the analysis of the motion process of armature in the bore. The change law of contact resistance under the condition of different mutual inductance coefficients is analyzed. The change curve of contact resistance is compared with the 3D model of the test track and the damage image of rail after the actual launching test, respectively. The comparative results show that the ablation and friction damage of rail show several typical characteristics, such as burning, sliding and abrasion, due to the changes of armature displacement and contact resistance. Key

Key words: augmentedelectromagneticrailgun, armature, contactresistance, mathematicalmodel, raildamage

CLC Number:

TJ866

WANG Zhen-chun， BAO Zhi-yong， CAO Hai-yao， LIU Fu-cai， ZHAN Zai-ji， WANG Da-zheng. Research on Contact Characteristics of Armature and Rail in Augmented Electromagnetic Railgun[J]. Acta Armamentarii, 2018, 39(3): 451-456.

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第39卷
第3期2018 年3月兵工学报ACTA
ARMAMENTARIIVol.39No.3Mar.2018

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