Performance analysis of quadrupole electromagnetic railgun launchers based on muti field coupling simulation

DOI:	10.11809/bqzbgcxb2023.04.016
Keywords:	electromagnetic railgun launcher; muti field coupling analysis; dynamic launching process; numerical simulation
Abstract:	The working process of electromagnetic railgun launchers involves complex multi field coupling, and it is difficult to analyze their performance only through analytical calculation. In order to study the dynamic launching process of an electromagnetic railgun launcher, this paper establishes a simulation model of transient electromagnetic thermal structural multi field coupling by taking a quadrupole convex electromagnetic railgun launcher as the research object. The CLM model is used to simulate the electrical contact between the interference armature and the rails during the launching process. The variation of armature and rail force with time and the distribution of the electromagnetic field, stress and temperature during the launching process are obtained. The research results show that the change trend of the armature and rail force is close to that of the excitation current, and the skin effect and the velocity skin effect will cause the weakening of the force. The electromagnetic force will change the pressure distribution on the contact surface, improve the contact state of the pivot rail, and then change the current distribution in the contact area. During the launching process, due to the action of friction, the maximum temperature rise is at the tail of the armature arm while the maximum current density appears at the armature throat. The research has some reference significance for understanding the dynamic launching process of the launcher and the multi field coupling mechanism in the launching process.
Issue:	Vol. 44 No. 4 (2023)
Published:	2023-04-28
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