Initial velocity and influence factors of tank explosion fragments
ZHAO Beilei1, ZHAO Jiguang2, CUI Cunyan1, WANG Yan1, SUN Wuhua3
1. Department of Aerospace Science and Technology, Space Engineering University, Beijing 101416, China;
2. Department of Electronic and Optical Engineering, Space Engineering University, Beijing 101416, China;
3. 63618 Troops of the PLA, Korla 841001, China
Abstract：To determine the initial velocity of tank explosion fragments under the propellant detonation, the fragment initial velocity (FIV) model was established based on the energy conservation law, in which the kinetic energy of explosion fragments, the kinetic energy and internal energy of detonation products, the failure energy and the consumed energy for expansion work of tank shell were considered. The FIV model was in good agreement with the calculation results of typical empirical formulas and the experimental data, which verifies the effectiveness of the model. Based on the dimensional analysis method, the key parameters affecting the initial velocity were determined. Based on AUTODYN software, numerical simulation was conducted and the effects of height-diameter ratio, thickness-diameter ratio and air density on fragment initial velocity were analyzed. Results show that the initial velocity of explosion fragment decreases rapidly with the increase of height-diameter ratio, and the attenuation trend slows down when the height-diameter ratio exceeds 1.50. The initial velocity almost linearly decreases with the increase of thickness-diameter ratio. When the explosion height is less than 20 km, as the explosion height rises, the air density decreases, and the initial velocity increases. The air becomes very thin above 40 km, and the influence of shell expansion work on initial velocity can be neglected.
赵蓓蕾, 赵继广, 崔村燕, 王岩, 孙武华. 贮箱爆炸碎片初始速度及影响因素[J]. 北京航空航天大学学报, 2019, 45(9): 1797-1804.
ZHAO Beilei, ZHAO Jiguang, CUI Cunyan, WANG Yan, SUN Wuhua. Initial velocity and influence factors of tank explosion fragments. JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2019, 45(9): 1797-1804.
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2019, Vol. 45 
