Analysis And Design Of Barrel Ablation Simulation Test Device And Engineering Application

Based on the high and low pressure launching principle and the semi-closed explosive device,this paper designs a barrel ablation simulation test device that can integrate the pressure,temperature and thermo-chemical reaction of the gunpowder gas to simulate the gunpowder gas in the chamber at different positions when the gun is fired.Changes in pressure.The high and low pressure method overcomes the large pressure control error of the pressure-controlled blasting diaphragm and the single working condition in the traditional barrel weapon ablation test device.Using the Simulink simulation module in MATLAB,the corresponding numerical calculation model was established.Taking a certain type of 35 mm gun as the simulation target,the influence degree of the relevant parameters of the test device on the characteristic quantities of the ablation test was analyzed by the orthogonal experiment method,and the test device’s performance was determined.Optimal solution.The flow field of the gunpowder gas inside the test device was simulated by the fluid mechanics analysis software,and the pressure and flow characteristics of the gunpowder gas in the test device were analyzed,and the pressure and velocity distribution of the high-pressure and high-speed gunpowder gas in the test device were obtained.According to the numerical calculation and simulation results,the structure of the test device was designed,and the blasting shape of the blasting diaphragm used in the test device and the parameters affecting the blasting shape were analyzed using LS-DYAN software,and a controlled pressure blasting suitable for this test device was designed and manufactured.The ablation simulation test of a certain type of 35 mm gun barrel verifies the feasibility of the principle of the test device and the reliability of the structure of the test device.Through the ablation simulation test,the deficiencies in the design of the test device were found,and the direction of further improvement and research of the test device was determined.