로켓보조추진이 적용된 120밀리 박격포탄의 동특성 분석

Dispersion of RAP(Rocket Assisted Propulsion) ammunition was analyzed according to dynamic characteristic. To compare and analyze the dynamic characteristic of 120MM mortar which is RAP applied, perform 4-DOF analysis of 120MM RAP ammunition and 155MM RAP ammunition using the PRODAS analysis tool. As a analysis results, 120MM mortar ammunition precessional motion amplitude has OO% bigger than 155MM howitzer ammunition. Shot group results are obtained by computational analysis, applying the muzzle velocity and ignition delay time as a real firing conditions. As a result, ammunition pose when rocket propellant ignition start has an effect on shot group dispersion, ammunition pose is decided by precessional motion and ignition delay time.