Abstract <p>In order to obtain the response characteristics of the projectile under dynamic load, this paper constructs a theoretical model of the projectile structure reflecting the basic connection characteristics of the charge and shell based on the concentrated mass method. The 4^th order Runge-Kutta method is used for numerical solution. The influence law of the projectile response under the multi-pulse cycle load in the target penetration process is analysed. The results show that: there is indeed a ‘small load, large response’ response of the projectile structure. The influencing factors that lead to the amplification of the projectile structure response are more numerous and complex. In the actual projectile structure design, the need to comprehensively consider the role of each parameter condition, in order to better reduce the risk of local response amplification, to avoid the occurrence of early ignition and early detonation of the projectile.</p>