文章基本信息

标题：3D numerical simulation and analysis of railgun gouging mechanism
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作者：Jin-guo Wu ; Bo Tang ; Qing-hua Lin 等
期刊名称：Defence Technology
印刷版ISSN：2214-9147
出版年度：2016
卷号：12
期号：2
页码：90-95
DOI：10.1016/j.dt.2015.12.006
出版社：Elsevier B.V.
摘要：Abstract A gouging phenomenon with a hypervelocity sliding electrical contact in railgun not only shortens the rail lifetime but also affects the interior ballistic performance. In this paper, a 3-D numerical model was introduced to simulate and analyze the generation mechanism and evolution of the rail gouging phenomenon. The results show that a rail surface bulge is an important factor to induce gouging. High density and high pressure material flow on the contact surface, obliquely extruded into the rail when accelerating the armature to a high velocity, can produce gouging. Both controlling the bulge size to a certain range and selecting suitable materials for rail surface coating will suppress the formation of gouging. The numerical simulation had a good agreement with experiments, which validated the computing model and methodology are reliable.
关键词：Impact dynamics; Gouging; Finite element simulation; Rail damage; Railgun