| This paper introduces the domestic and overseas research background and the developing trend of sniping rifle, analyzes the structure of Model 85 7.62mm sniping rifle, and give an optimal project.Using the knowledge of classical interior ballistics theory, weapon aerodynamics theory, automation weapon dynamics theory and multi-degree rigid-body kinetics theory, the motion of the sniper rifle is analyzed in detail and the 2D mathematics model of this sniping rifle is built up. To acquire the rules of gas motion in the gas operated device, a group of differential equations are set up, which are related with the motion of the gas in the interior ballistic and the movement of the automatic mechanisms. Compared with the Formula Brownwen, this method can give more precise outcome and can be used more widely.Basing on the mathematics model, the software of the sniping rifle dynamics simulation and optimization is developed. Through the friendly man-machine interactive interface, the influence of every structure factor on the performance of the system's dynamics characteristic can be analyzed conveniently and promptly. In order to show the interior ballistics process and the motion of the primary parts of the sniping rifle, the result is outputted as tables or curves.In order to decrease the recoil of the sniping rifle, a new type of gunstock is designed, and analyzes the structure of the gunstock.To optimize this sniping rifle, the results are analyzed in detail. The influences on the performance of this sniping rifle are studied, and an ameliorative scheme is given.In order to compare with the recoil of the ameliorative scheme, an experimental test was given for the sniping rifle. |
