DocumentCode :
69995
Title :
Simulations on Arc Surfaced C-Shaped Armatures for Round-Like Bore Railguns
Author :
Deng Feng ; Junjia He ; Lixue Chen ; Shengguo Xia ; Zheng Xiao ; Liangliang Tang ; Jun Li ; Ping Yan
Author_Institution :
State Key Lab. of Adv. Electromagn. Eng. & Technol., Huazhong Univ. of Sci. & Technol., Wuhan, China
Volume :
41
Issue :
5
fYear :
2013
fDate :
May-13
Firstpage :
1467
Lastpage :
1474
Abstract :
Previous solid armature design studies have emphasized the effect of geometry change on armature performance. In order to acquire more uniform contact pressure and current density distributions at the armature-rail interface, the novel modified C-shaped armatures for round-like bore railguns are proposed and analyzed. By removing and adding two pieces of circular arch from the conventional C-shaped armature trailing arms, we construct two types of arc surfaced C-shaped armature (ASCA) for corresponding round-like bore railguns. They are called concave ASCA and convex ASCA. In this paper, both concave ASCA and convex ASCA are simulated with finite element method. The detailed description and construction of the model are presented. 3-D calculations of contact area, contact pressure, and current density distributions are performed and compared. Specially, current density simulations are modeled according to the results of elastic contact calculations. In addition, split-leg ASCAs are also simulated and discussed. The simulation results show that the performances of one split-leg concave ASCA are the best. Further electromagnetic launch experiments of concave ASCAs are in good agreement with the simulation results.
Keywords :
current density; elasticity; finite element analysis; mechanical contact; railguns; 3D contact area calculations; C-shaped armature trailing arms; arc surfaced C-shaped armatures; armature performance; armature-rail interface; circular arch; concave ASCA; contact pressure; convex ASCA; current density distributions; current density simulations; elastic contact calculations; electromagnetic launch experiments; finite element method; model construction; model description; modified C-shaped armatures; round-like bore railguns; solid armature design; split-leg ASCA; uniform contact pressure; Armature; Current density; Geometry; Load modeling; Railguns; Rails; Solid modeling; Arc surfaced C-shaped armature (ASCA); contact pressure; current density; railguns; round-like bore;
fLanguage :
English
Journal_Title :
Plasma Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-3813
Type :
jour
DOI :
10.1109/TPS.2013.2245631
Filename :
6470699
Link To Document :
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