Research on Armature's Wearing and Dynamic Interior Ballistic of A Railgun

In order to achieve a normal performance of the armature, which is a moving part carrying currents in a railgun, it is of great importance to maintain good electrical contacts between the armature and rails. In this paper, based on mutiphysics effects, a dynamic interior ballistic process considerin...

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Bibliographic Details
Published in:IEEE transactions on plasma science 2017-07, Vol.45 (7), p.1202-1207
Main Authors: Wu, Jinguo, Wan, Gang, Cheng, Niankai, Li, Long, Li, Baoming
Format: Article
Language:English
Subjects:
Aerodynamics
Armature
Contact resistance
Contacts
electromagnetic launch (EML)
Force
Friction
interior ballistic
railgun
Railguns
Rails
sliding electric contact
wear
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Summary:In order to achieve a normal performance of the armature, which is a moving part carrying currents in a railgun, it is of great importance to maintain good electrical contacts between the armature and rails. In this paper, based on mutiphysics effects, a dynamic interior ballistic process considering the friction loss, nonlinear electrical contacts, and aerodynamic drag is established to simulate the movement of the armature in bore. Some dynamic parameters versus time, such as the forces on the armature, the wear rate of armature, and the interference, were obtained and analyzed. Incorporating with the morphology of rail surfaces after a shot, the dynamic contact status between the armature and rails is discussed. The simulations coincide well with experimental results.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2017.2701414