Hoop Strain Based Estimation of Base Pressure and Finite Element Simulation of an Artillery System

This study proposes a digital-twin-based FE(finite element) framework for simulating the firing process of an artillery using measured strain data. Because breech pressure alone cannot reproduce realistic barrel behavior, a hoop strain-based method is developed to estimate the projectile-base pressure and the pressure distribution. An interior ballistic model with a time-dependent correction factor is introduced to describe the relationship between the breech and projectile-base pressures. The estimated pressure is applied to the FE simulation. The simulated hoop strain and projectile motion show good agreement with measurements. The proposed approach effectively integrates experimental data, analytical model, and FE simulation, establishing a reliable framework for realistic artillery firing analysis and providing a foundation for future studies on dynamic barrel-projectile interaction.