Research Article
Dynamic Response and Parameter Analysis of Electromagnetic Railguns under Time Varying Moving Loads
Table 1
Parameters of the armature and the rail.
| | Parameter | Value |
| | Rail length (L) | 2000 mm | | Rail height (h) | 20 mm | | Rail width (b) | 10 mm | | Distance between rails (s) | 20 mm | | Elastic modulus (E) | 110 GPa | | Foundation stiffness (k) | 10 GPa | | Contact length between armature and rail (l) | 24 mm | | Rail density (ρr) | 8900 kg/m3 | | Armature height (ha) | 20 mm | | Armature mass (M) | 20 g | | Armature density (ρa) | 2700 kg/m3 | | Elastic modulus of armature (Ed) | 70 GPa | | Armature conductivity (σd) | 3.7 × 107(Ω/m) | | Sliding friction coefficient (μ) | 0.05 | | Heat conduction coefficient of armature material (λT) | 237 W/(m · °C) | | Heat transfer coefficient of armature material (αF) | 500 W/(m · °C) | | Linear expansion coefficient (αT) | 2.35 × 10−5 (°C−1) |
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