摘要
用工程理论计算、数值模拟和实验验证方法研究了小破片和杆破片撞击起爆屏蔽(屏蔽板为6mm厚钢板)B炸药的速度阈值。结果表明,对于小破片,3种方法计算出的屏蔽B炸药撞击起爆速度阈值基本接近;而对于杆破片,计算出的撞击起爆速度阈值偏小,数值模拟和实验得出的速度阈值基本接近。这说明所引用的屏蔽B炸药破片撞击起爆速度阈值工程理论计算公式只适用于小质量规则破片,而由于计算公式中缺少体现打击面积的参数,因而并不适于计算杆破片的屏蔽B炸药撞击起爆速度阈值。由实验方法得出,用4.65 g小破片撞击起爆6mm钢板屏蔽B炸药的速度阈值约为2 522m/s,用质量为8.78 g、直径为5mm的杆破片撞击起爆6mm钢板屏蔽B炸药的速度阈值约为2 161m/s。
The critical detonating velocity of 6 mm steel shielded composition B impacting by small fragment and pole fragment is researched by means of academic engineering calculating （method 1 ）, numerical simulating （method 2） and experiment validating （method 3）. The results show that the critical velocities of shielded composition B impacting by small fragment gained by three methods are approximately equivalent. But for pole fragment, the critical velocity gained by method 1 is less than that gained by method 2 and 3 and the critical velocities gained by methods 2 and 3 are approximately equivalent, showing that the academic engineering calculating formula isn＇t applicable for pole fragment as a result of lacking impacting area parameter. The results obtained by method 3 show that a small fragment with mass of 4. 65g, velocity of 2522m/s can detonate compotition B with 6mm armor covered plate, and a pole fragment with mass of 8.78g, diameter of 5mm and velocity of 2 161 m/s can detonate composition B charge with 6mm armor covered plate.
出处
《火炸药学报》
EI
CAS
CSCD
2006年第1期5-9,共5页
Chinese Journal of Explosives & Propellants
关键词
爆炸力学
撞击起爆
B炸药
数值模拟
explosion mechanics
initiation by fragment impacting
composition B
numerical simulation
