Design And Analysis Of The Gun Barrel Parameterization

The barrel assembly is one of the main components of the artillery, its main role is to launch shells, to withstand gunpowder gas pressure, giving certain muzzle velocity of the projectile and fired. Design cycle of traditional design method of barrel assembly is long, and it’s difficult to change. With the development of computer technology, Parametric technology has been more widely used, many dedicated parametric design system developed for different areas of expertise, thus designers freed from a large number of complicated pieces of work, greatly improving the design R&D efficiency.This paper focuses on the issues parameterized design and analysis of barrel assembly. The main contents are as follows:(1) On the basis of the typical barrel assembly, the model has been analyzed and processed. Taking barrel for example, introduced the geometric constraint types, description of methods and solving method, and studied the geometric constraints model constructor. On that base, established geometric constraint model the barrel, breech, muzzle brake and barrel assembly. Using Pro/E secondary development in VB, established the constraint model driven by parameters of geometric, completed the barrel assembly parametric design.(2) Based on "stream files" of ANSYS, using APDL language completed parameterized finite element analysis model of the barrel assembly’s main components, including the geometry built mode, unit type selection, definition of material properties, boundary conditions, load and mesh of the finite element analysis process. Laid the foundation for the fast pre-design analysis demonstrated.(3) Analyzed the barrel force of the projectile during launch, based on Euler-Bernoulli beam, derived vibration equation of barrel assembly. After analysis needs of project, extracted the relevant parameters as design variables, and used Runge-Kutta method to write the parameterized barrel assembly dynamic characteristics analysis program.Finally, in the establishment of a parametric structural design, finite element analysis, dynamic analysis model of the premise, applying these models to the design and analysis of a certain type of barrel, showing the entire parametric design and analysis process. And quickly got a three-dimensional model of the barrel, obtained stress cloud picture and response of the muzzle by analyzing the barrel under gas pressure. Verified the feasibility and effectiveness of the method of analysis of parametric design.