To investigate the dynamic response characteristics of penetration warhead under impact load,the simulation of warhead penetrating into a semi-infinite concrete target was conducted using the projectile-target separation method. The dynamic response of the warhead under different charge and shell head-curve-ratios,velocities,and sizes was analyzed. The results indicate that the deceleration peak of charge is higher than that of warhead shell. The deceleration peaks and deformation of the charge are positively correlated with the head curve ratio of charge. The deformation of the charge caused by stress wave is primarily concentrated on its end face and at the transition between the head and cylinder section. Increasing the head curve ratio(CRHS)of the warhead shell reduces deceleration peaks for both the shell and charge,as well as their maximum overload difference. Specifically,the maximum plastic strain of the charge at CRHS=4 is about 29％ of that at CRHS=2,with a significant reduction in high strain area. The initial velocity of penetration mainly affects the overload amplitude. Furthermore,an increase in initial velocity results in higher overload and plastic deformation for both the shell and charge. Overload,penetration depth and stress amplitude adhere to similarity laws for different warhead-sizes,without considering factors such as concrete aggregate size and strain rate. However,larger warhead size results in more severe plastic-deformation of charge.
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