Impact Dynamics of the M557 Fuze（冲击动力学M557引信）.pdf

ARMY RESEARCH LABORATORY s«3$ \ ,. . *u?M;;Ä. . r-*Ä*w.»i Impact Dynamics of the M557 Fuze by G. A. Gazonas ARL-TR-1713 July 1998 Approved for public release; distribution is unlimited. jmQ qaLm argpEcraD The findings in this report are not to be construed as an official Department of the Army position unless so designated by other authorized documents. Citation of manufacturers or trade names does not constitute an official endorsement or approval of the use thereof. Destroy mis report when it is no longer needed. Do not return it to the originator. Army Research Laboratory Aberdeen Proving Ground, MD 21005-5066 ARL-TR-1713 July 1998 Impact Dynamics of the M557 Fuze G. A. Gazonas Weapons and Materials Research Directorate, ARL Approved for public release; distribution is unlimited. Abstract This report outlines the results of a combined experimental and computational study that investigates the transient structural response of the M557 point detonating fuze subjected to low- speed (200 m/s) oblique impact by a hardened-steel projectile. The problem is of interest to the explosive ordnance disposal (EOD) community as it is a method that is currently used to render- safe ordnance and other explosive devices found in the field. An inert M557 fuze is instrumented with a low-mass (1.5 gram) 60-kilo-g uniaxial accelerometer and subjected to oblique impact by launching a 300-gram projectile from a 4-in airgun. The transient structural response of the fuze is compared to the predicted response using the Lagrangian finite element code DYNA3D. Peak accelerations measured in two tests average 35 kilo-g, whereas DYNA3D predicts a 40- to 50-k