Buried Bomb Ballistic Numerical Simulation And Structure Analysis

A cased telescoped ammunition (CTA) is a cylinder ammunition which embeds a bullet in the case completely. There is propellant around the bullent. It is obtained great attention by European and American countries because of its small quality, compact structure and high firing rate. In view of its good application prospect, our country also starts to study the CTA weapon System.In order to reduce the turrent size, increase power and firing rate of artillery, a new type of ammunition-CTA is researched more urgently. The overall structure of 40mm caliber CTA is designed by researching CTA weapon status. Firstly, the mathematical model about the interior ballistic of CTA artillery is established according to the characteristics of the structure and trajectory process. Then the bore pressure and velocity curves are simulated according to the demand by Matlab/Simulink software. The numerical method is 4th order Runge-Kutta. The interior ballistic trajectory characteristic and special structure of the 40mm caliber CTA are analyzed. The effect of the design parameters on ballistic are analyzed. Thirdly, the parts structure of CTA are modified and optimized by obtained parameters. Finally, the stress and distortion under the maximum bore pressure are simulated through ANSYS so that the launching safety of the bullet is examined. The contact distortion between case and tube is simulated by the finite element software ABAQUS.The simulation results indicate that the muzzle velocity and bore pressure can be satisfied by the CTA trajectory characteristics. The trajectory consistency, the assembly structure and the bullet emission security are reasonable. The case intensity can satisfy the demand earnestly. This thesis provides the theory support to the research of CTA weapon.