AN EXPERIMENTAL TECHNIQUE TO MEASURE PROJECTILE DECELERATION HISTORY DURING NORMAL PENETRATION INTO PLAIN CONCRETE

摘要

The present paper presents a new experimental method to measure the deceleration time his-tory of projectiles penetrating into concrete in full-size test.The experiment can be carried out by using anonboard accelerometer to measure the projectile deceleration history and the data are transmitted to a groundrecording system.With this experimental method,a series of tests on hemisphere-nose steel projectiles pene-trating normally into plain concrete at the velocity region 150-400 m/s have been executed and the deceler-ation histories obtained.The high frequency portion in the deceleration data has been investigated and provedto be the structure response of projectile.The characteristics of deceleration history have also been analyzedand discussed.