The electromagnetic rail-gun is a kind of high-energy device which uses a high-current electrical pulse to accelerate projectiles to hypersonic velocity, and the launch performance of the system is affected by the thermal characteristic during the launching process. The electromagnetic rail-gun system is a multi-physics coupled system, so the different aspects and their interactions of the system should be considered when we analyze the performance of the barrel during the launching process. In this research, utilize finite element method to simulate the process that the armature squeezes the barrel. The finite element models for Joule heat and friction heat were established to simulate the transient thermal distribution, and the temperature distribution characteristic was analyzed. The magneto-structural analysis and the magneto-thermal-structural analysis of the barrel were accomplished. Based on the analyses above, the stress and strain distribution, the magnetic field distribution and temperature distribution were obtained. Comparing the results of the two kinds of analyses above, how load distribution influences the displacement and the stress of the electromagnetic rail-gun, how structure deformation influences the magnetic field and temperature field were acquired.
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