The Key Components Of The Artillery Fired Stress Analysis

This paper mainly analyzed the emission stress in the key parts of a gun in lunch process. According to the characteristic of the process, this paper used explicit method in ABAQUS/explicit module to simulate this transient mechanical process. This paper laid stress on establishing a FEM model, which is suitable for engineering application to calculate emission stress in the key parts of a gun on assembly level.This paper calculated and discussed the strength and stiffness of the gun especially the gun muzzle drop under the gravity.To analyze the emission stress, the paper discussed the effect of different density of mesh, symmetry, and simplifying to the interfaces to the results. After comparing with the results of different model, the best model was built.The analysis is on the assembly level instead of on the basis of single part in the traditional analysis and in explicit method the increments are very small. Therefore, the results are more rational. The recoiling displacement from the numerical simulation showed good agreement with it from simulation tests. So using the method to analyze emission stress of the gun is feasible and effective.The result of simulation indicated that the maximum of Mises stress in all the key parts is less than the yield stress of the gun steel. To all the key parts .the interior ballistic process is dangerous stage in the lunch process of the gun.To the designers of the gun, the building of FEM model is very useful in structural optimization design by shortening the period of design and reducing work intension. This method has reference values in analyzing the dynamic stress in some structure under transient loads such as blast and impact.