Bolt-shaped "back" Movement Analysis, The Impact Of Shooting Accuracy

Taking a wide view of the gun world, a new developing direction of the rifle is that research and development of the rapid burst firing, variable firing rate and delay recoiling to get high firing accuracy.In this paper, the study background is a new rifle with the bolt of "back" character form motion, and the question that the firing accuracy is influenced and impacted of the bolt of "back" character form motion is researched. The modeling of the virtual prototype is established, and simplified as a 2-d mathematical model with four components with five degree of freedom. The dynamics model of the 2-d mathematical model is established using Lagrange equation to obtain the differential equation of motion of each component in the different stages of the motion. The exterior ballistic model is made by the based principle of exterior ballistic. Numerical simulation of the dynamic model and the exterior ballistic model are simulated to get the motion characteristics curves of each component and the exterior ballistic curves by MATLAB programming. Based on the optimal analysis, main factors that the firing accuracy influenced by the bolt of "back" character form motion are found. With the comparison of the muzzle angular when the bolt deflected or not, that the bolt of "back" character form motion influences the firing accuracy is analysed. Through the layered optimization design and structural parameters optimization design, this paper explores a group of feasible optimization scheme.Through the above research work, the firing accuracy of this rifle is analysed and forecasted, reference is provided for the trial production in the future and correlation study of this rifle.