Experimental study and numerical analysis on energyrelease characteristics of bullet primer

DOI:	10.11809/bqzbgcxb2024.11.016
Keywords:	firearms; strike ignition; bottom fire; pressure response; numerical analysis
Abstract:	In order to study the energy release characteristics of bullet primer under different firing energy and different ambient temperature, the output pressure of primer was used to characterize the energy release characteristics, and the firing pin and the truncated cartridge case with primer were taken as the test objects.The assembly relationship of the firing and ignition system and the working conditions of the firing pin hitting the primer with different firing energy at different ambient temperatures were simulated by using the gun firing and ignition process simulation test device.The characteristic parameters of the primer output pressure were tested, and the quantitative evaluation of the energy release characteristics of the bullet primer was realized.A finite element model consistent with the test conditions was established.The finite element method was used to simulate the output pressure of the firing and ignition system when firing the primer with different energy at room temperature.Compared with the pressure response curves of the simulation and test, the pressure start up and peak arrival trends are basically the same.The maximum relative error of pressure characteristic parameters such as pressure initiation time, peak arrival time, and pressure peak is less than 13 %, which verifies the correctness of the simulation model and can better simulate the response process of gun firing ignition.The larger the firing energy is, the earlier the pressure initiation time and peak arrival time of the firing ignition system output are.The higher the ambient temperature is, the earlier the pressure initiation time and peak arrival time of the firing and ignition system output are.
Published:	2024-11-30
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