Kinetic Compensation of Barrel Launch Under High‐Speed Solid‐Phase Particulate Impacts

An accurate launch‐dynamics computational method is critical for barrel weapon service life assessment and multiphase physics field refinement. Given the lack of studies on the solid‐phase buildup behavior at the projectile base, this paper provides an improved method for calculating the launching dynamics under high pressure and high speed. The method realizes the compensation of projectile base pressure and velocity under the impact of numerous propellant particulates by modifying computational boundaries and appending propulsive forces. Unlike previous studies, it is found that the solid‐phase propulsion for the projectile is significantly larger than the gas‐phase propulsion for the projectile at the early stage of launch. Moreover, an artillery launch experiment with a large charge zone is conducted to verify the reliability of the computational method. The results show that the dynamic time wrapping deviations of the pressure and velocity based on the proposed method from the launch experiment are only 0.82% and 0.93%, respectively, and the root mean square error values are 2.1 MPa and 3.2 m/s, respectively, which are smaller than the deviation before compensation.