The failure study of missile accelerometer recorder under shock environment

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Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (13) : 182-186.

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The failure study of missile accelerometer recorder under shock environment

ＢＡＯＡｉｄａ１，２，ＣＨＥＮＹｕａｎｅ１，２，ＬＩＣｈａｎｇｌｏｎｇ１，２，ＬＩＵＪｕｎ１，２，ＦＡＮＧＸｕ

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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.

Key words

missile accelerometer recorder / shock / stress wave / failure

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ＢＡＯＡｉｄａ;ＣＨＥＮＹｕａｎｅ;ＬＩＣｈａｎｇｌｏｎｇ;ＬＩＵＪｕｎ;ＦＡＮＧＸｕ. The failure study of missile accelerometer recorder under shock environment[J]. Journal of Vibration and Shock, 2013, 32(13): 182-186