Electromagnetic The Orbital Shells Pill Squeezed Into The Process And Multi-physics Coupling Field Analysis

Based on the theory of structure mechanics, contact mechanics, elastoplasticity mechanics, thermodynamics, electromagnetism and finite element method, the projectile engraving process in the electromagnetic railgun and the gun barrel in the multi-physical is analysed.In this paper, the three-dimension common nodes finite element model of the barrel of the electromagnetic among different materials and the three-dimension finite element model of the armature are established. Utilizing finite element method to simulate the process that the armature squeezes the barrel, perform the parametric studies on different influencing factors. Based on the analysis above, establish the contact finite element model among different materials to simulate the armature squeezing process, obtain the deformation data and stress distribution of the barrel in the process.By establishing the two-dimension model of the barrel, the magnetism-structure directly coupling analysis and the magnetism-thermal-structure analysis of the barrel are accomplished and the stress and strain distribution are obtained, and also the magnetic field distribution and temperature distribution. Comparing the results of the two situations above to the static analysis, how does load distribution influence the displacement and the stress of the electromagnetic railgun, structure deformation influence the magnetic field and temperature field influence the structure are acquired. Finally, the paper analyses the effect of the variation of the current intensity on the intensity and stiffness of the barrel, and the maximum current intensity on the electromagnetic railgun with specified structure and materials is obtained, which would be a reference for further research.