Analysis of dynamic mechanical state of electromagnetic synchronous induction coils during propulsion

DOI:	10.11809/bqzbgcxb2023.05.023
Keywords:	synchronous coil; electromagnetic propulsion; finite element simulation; armature deformation; structural optimization
Abstract:	The strong electromagnetic force in an electromagnetic synchronous coil launcher will cause a great mechanical impact on the coil and make the armature deform. In order to avoid the shortening of the life of the launcher, armature deformation and safety problems caused by excessive electromagnetic force, this paper studies the stress state of the primary coil and the armature during the launch process, and carries out structural optimization and simulation verification for the deformation of the armature. By constructing a mathematical model of the electromagnetic synchronous coil launcher, physical quantities like armature stress distribution and deformation are compared and analyzed through a combination of COMSOL finite element simulation analysis and experimental verification. The simulation results show that, compared with the other parts of the armature, the electromagnetic force at the armature tail is the largest and the shape variable reaches 0.184 mm at the peak current of the driving coil. The experimental results of armature deformation performed on the test platform are basically consistent with the simulation results. Compared with increasing the thickness of the reinforced lacing, increasing its length is more conducive to reducing the stress at the armature tail, which significantly reduces the armature deformation by 57%.
Issue:	Vol. 44 No. 5 (2023)
Published:	2023-05-28
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