Abstract: A numerical calculation model of interaction between bullet and barrel is established to deeply study a matching design method of sniper rifle, which is based on nonlinear finite element theory. The proposed model is a comprehensive theory model to analyze launch process. Validation experiments were conducted. The experimental results are in agreement with the calculated results. The orthogonal experimental method is used to study the robustness of the main design parameters of bullet and barrel, in which the design parameters of bullet and barrel, the eccentric mass of bullet and the swing angle are taken as control factors, noise factor and performance measure, respectively. The calculated results of design parameter robustness in two levels are obtained. The calculated results of four groups of matching parameters of barrel and bullet with or without noise factor are agreed with the experimental results, which proves the correctness and feasibility of the robust design for matching design of bullet and barrel.

Key words: ordnance science and technology, sniper rifle, matching design, numerical model, coupling calculation, robust design