Abstract
A large amount of heat will be produced in the railgun launching process, the heat-induced temperature mutation is an important cause of material failure. To obtain temperature field variation law in railgun, mechanism of heat generation was analyzed according to the basic working principle of railgun. Temperature field was discussed through the method of combining theoretical calculations and Finite Element simulation. The results show that friction heat results in temperature rise on the materials only near the contact interface; temperature rise under the action of current heat around the corner of U-shaped armature is obvious, while maximum temperature is appeared at the side surface and exceeds the melting point of the armature material. The temperature of railgun mainly depends on the current value, while friction heat has smaller effect on it.
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