Dynamic Analysis Of Nonlinear Finite Element Structure Of A Naval Gun

Taking a large caliber naval gun as the research object, this article explored issues related the naval gun launch dynamics which considering the interaction between the projectile and the barrel through nonlinear finite element theory. The study can provide certain theoretical basis for the design and manufacture for subsequent naval gun.This article explored the finite element modeling of complex mechanical structure, during the process of meshing, element type, mesh number, cell density distribution, order selection and mesh quality evaluation factors were studied, besides, this article explored connection between the different element types. This article adopt the method of segment sweep mapping manner to complete finite element mesh of the rifling barrel by the Solid-Map function of Hypermesh software, and then completed the three-dimensional solid modeling and meshing the whole gun.In this dissertation, the finite element model of naval gun which based on the projectile-barrel coupling system was build. This article build cartridge belt material behavior through the material subroutine of ABAQUS, Besides, This article used ABAQUS finite element analysis software and the theory of nonlinear finite element analysis, explored the muzzle disturbance caused by the interaction between projectile and barrel, based on the comprehensive analysis of the explicit and implicit analysis.In this paper, A finite element analysis reference model of collision between the supporting-ring of barrel and cylinder of cradle was built by using ABAQUS software. Based on the basis of the reference model, the parametric modeling was completed by using Python language. In order to improve gun shooting accuracy, reduce muzzle disturbance, the cooperate relationship between the supporting- ring of barrel and cylinder of cradle was optimized by using Isight multidisciplinary optimization software and selecting MOPSO algorithm.