1.Key Laboratory of Instrumentation Science & Dynamic Measurement (North University of China), Ministry of Education, North University of China, Taiyuan 030051, China2. Science and Technology on Electronic Test & Measurement Laboratory, North University of China, Taiyuan 030051, China
Abstract:The paper focuses on projectile penetrating process, the influence of the missile acceleration recorder by the high g shock was analyzed, and the recorder acceleration value under the shock stress wave was concluded. The dynamic structural response of the acceleration recorder shell, buffer material and circuit board was analyzed and failure model is putted forward: the failure of shell structure, buffer material performance insufficiency, the relative motion of chip and PCB board results in chip cracking. For each failure mode, each protection unit of the recorder was numerically simulated by ANSYS/LS-DYNA,and after that,the protection unit failure critical stress value is obtained:circuit board failure critical acceleration is 1.93×104g; the shell is buckling when the impact acceleration is 1.63×105g; increasing the impact acceleration to 5.63×106g, buffer material is failed. After real ammunition penetration test, it is concluded that recorder is failed in 1.5×105g impact acceleration. The results of this experiment provide data support to the design and optimization of subsequent projectile actual penetration missile acceleration recorder.