Study on missile acceleration test recorder for penetrating earth target

The acceleration test recorder, which records the process of missile's penetrating the earth target, was studied. The design theory of internal test memory circuit was proposed. A shell of medium thickness was designed to protect the circuit. The experiment method was proposed to determine the thickness of the aluminum foam, which was filled inside the shell. To investigate the typical failure model of the circuit module which was caused by the shell buckling and the bad performance of the form, the structural performance under impact load was analyzed with ANSYS/LS-DYNA software. The theoretical resistance to impact was 43000 g by the suggestive shell radius of 29 mm, shell thickness of 3 mm, and aluminum foam thickness of 23 mm. The penetrating experiment was conducted in which the impact acceleration peak was 20300 g with and the recorder structure and the circuit undamaged.