AN ENGINEERING MODEL FOR CALCULATING AXIAL PROJECTILE VELOCITY OF AXIAL-PREFORMED FRAGMENTS DRIVEN BY A CONFINED EXPLOSIVE CHARGE
A warhead with front-placed axial-preformed fragments is a major type of directional warhead, and its damage effectiveness is affected directly by the axial projection velocity of axial-preformed fragments. An engineering model to predict the velocity of axial-preformed fragments driven by detonation of a confined explosive charge is developed in this paper. The model is built from the conventional Gurney equation of one-dimensional motion and derived under the hypotheses of twodimensional motion of detonation products. Pressure adjustment factor, which represents the effect of the geometric properties of the explosive charge on the fragment velocity, is fitted by matching the predictions of the engineering model with the simulation results of three-dimensional finite element analyses. The relative difference between the measured velocity in the detonation test of the explosive charges and the prediction of the proposed model is less than 3%. This validates the proposed model and shows its successful applications in engineering design and optimization of explosive charges in warheads.
LI Tie-peng QIAN Jian-ping XING En-feng NIU Gong-jie
Ordnance Mission, Naval Armament Department, Postcode 100841, Beijing, China School of Mechanical Engineering, Nanjing University of Science & Technology, Postcode 210094, Nanji Beijing Research Institute of Mechanical & Electrical Engineering, Postcode 100074, Beijing, China
国际会议
25th International Symposium on Ballistics(第25届国际弹道会议)
北京
英文
659-667
2010-05-17（万方平台首次上网日期，不代表论文的发表时间）