Analysis of Sliding Electric Contact Characteristics of Series-augmented Railgun Based on Breech Voltage

ZHU Chunyan;WANG Jun;MA Fuqiang;NI Yanjie;TANG Bo;LI Baoming

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  • Sponsored by: China Association for Science and Technology (CAST)

    Editor-In-Chief: Xu Yida

    ISSN 1000-1093

    　

  • Hosted By: China Ordnance Society

    Published By: Acta Armamentarii

    CN 11-2176/TJ

Acta Armamentarii, a Chinese monthly journal, was first published in 1979. The journal is supervised by China Association for Science and Technology, sponsored by China Ordnance Society，and edited and published by Editorial Board of Acta Armamentarii. The Journal is included in all important domestic databases，and also collected by Engineering Index (EI, USA), Chemical Abstracts (CA, USA), Science Abstracts (SA, UK）, Abstract Journal (AJ, Russia), and Current Bibliography on Science and Technology(CBST).Acta Armamentarii has been selected into the journal Of Ordnance Science and Technology (Weapons Industry) Field Of High Quality Scientific and Technological Periodical Classification Catalogue (2022 edition), ranking T1, and the journal of Automotive Engineering Field of High Quality Scientific and technological Periodical classification Catalogue, ranking T2.
Acta Armamentarii ›› 2020, Vol. 41 ›› Issue (7) : 1280-1287. DOI: 10.3969/j.issn.1000-1093.2020.07.004
Paper

Analysis of Sliding Electric Contact Characteristics of Series-augmented Railgun Based on Breech Voltage

  • ZHU Chunyan, WANG Jun, MA Fuqiang, NI Yanjie, TANG Bo, LI Baoming
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Abstract

An analysis method based on the breech voltage is proposed to study the sliding contact resistance characteristics of the partially augmented electromagnetic railgun. A mathematical model of contact resistance, breech voltage, breech inducted voltage and rail current is constructed. The proposed model is used to quantitatively characterize the sliding contact resistance. Through the analysis of the characteristics of the contact resistance waveform, the state of contactbetween armature and rail is divided into four stages: start-up stage, resistancesteady decline stage, resistance growth stage, and single rail stage. The launch efficiency of launching system and the energy consumption rate of contact resistance Joule heat are calculated. The results show that the contact resistance is high as the interface between the armature and rails is in a solid-solid contact state at the initial startup stage; the gradually formed aluminum melt film increases the actual contact area and improves the contact state; the contact pressure is negatively correlated with contact resistance; the contact resistance is an important factor affecting launching efficiency. Therefore, the analysis of the sliding electric contact characteristics of the partially angmented railgun plays a positive role in the mechanism research and design of the railgun. Key

Key words

partiallyaugmentedelectromagneticrailgun / contactresistance / breechvoltage / contactresistanceJouleheat

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ZHU Chunyan, WANG Jun, MA Fuqiang, NI Yanjie, TANG Bo, LI Baoming. Analysis of Sliding Electric Contact Characteristics of Series-augmented Railgun Based on Breech Voltage. Acta Armamentarii. 2020, 41(7): 1280-1287 https://doi.org/10.3969/j.issn.1000-1093.2020.07.004

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第41卷第7期2020年7月
兵工学报ACTA ARMAMENTARII
Vol.41No.7Jul.2020

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