为了研究爆炸变形式破片战斗部变形型面与破片飞散特性的关系，对113mm口径的D型结构型面约束下的破片飞散特性进行了试验，并采用LSDYNA软件对内凹、外凸和D型等三种型面约束下破片的飞散特性进行仿真研究，获得了破片的空间分布特性和初速随方位角的分布规律。结果表明，D型结构的破片主要聚焦在目标方向±10°范围内，且偏心起爆的聚焦效果略好于中心起爆；不同起爆方式下目标方向的破片初速相差不大，都是随方位角的增加而降低；不同型面约束下破片飞散偏折角与爆轰波入射角之间近似满足不同斜率的线性关系。最后根据该线性关系特征提出了能够计算不同型面下飞散偏折角随入射角变化的工程计算式。
Abstract
In order to research on the dispersion rules of fragments from deformable warheads effected by the deformed outline, the experiments of D outline structures and the simulation of concave, convex and D outline structures have been done to analyze the dispersion rules of fragments.The results of fragments distribution and initial velocities were obtained from the experiments and simulation. The results of simulation are in good agreement with experimental data. The results show that the fragments focus on target-direction at a range of ±10°, and the focusing effect of fragments from asymmetrical initiation structures would be better than that from initiation at axes. The initial velocities deduce with the azimuth angle, and it shows little difference between different initiation types qualitatively and quantitatively. The relationship between the projection angle of fragments and the incident angle of shock waves are linear with different slopes for different outline structures. Based on the linear relationship, an engineering equation was given to calculate the projection angle for different outline structures.
关键词
爆炸力学 /
爆炸变形式战斗部 /
D型结构 /
飞散偏折角
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Key words
Mechanics of explosion /
Deformable warhead /
D outline structure /
Projection angle
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参考文献
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