Dynamic Response of Composite Rail during Launch Process of Electromagnetic Railgun

doi:10.3969/j.issn.1000-1093.2017.04.004

Abstract

Abstract: Armature is subjected to an electromagnetic force to move along the composite rail when electric current flows into the electromagnetic rail. The inner surface of the rail may be worn and planed due to ampere force and armature pressure, which limits the service life of the electromagnetic rail gun. Copper-based composite rail has good conductivity, corrosion resistance and higher strength. The composite rail is simplified as an elastic foundation beam, and its mechanical characteristics are analyzed. The general solution of the dynamic deflection of composite rail under moving load is obtained by using the two- dimensional Fourier transform. The dynamic response of the composite rail under the launching of electromagnetic railgun is obtained. The influences of the geometrical dimensions of composite rail and the input voltage on the dynamic response of composite rail are analyzed. The results show that the influence of armature pressure on the rail deformation is much larger than that of the repulsive force, and the dynamic property of rail can be improved by using the reasonable proportion of composite layer thickness. Key

Key words: ordnancescienceandtechnology, compositerail, dynamicresponse, Fouriertransform, movingload, elasticfoundationbeam

CLC Number:

TJ866
O343.3

TIAN Zhen-guo, MENG Xiao-yong, AN Xue-yun, BAI Xiang-zhong. Dynamic Response of Composite Rail during Launch Process of Electromagnetic Railgun[J]. Acta Armamentarii, 2017, 38(4): 651-657.

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第38卷
第4期2017 年4月兵工学报ACTA
ARMAMENTARIIVol.38No.4Apr.2017

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