非轴对称结构约束下破片飞散特性的试验和仿真研究

发布时间：2018-02-28 06:14

本文关键词： 爆炸力学爆炸变形式战斗部 D型结构飞散偏折角　出处：《振动与冲击》2016年15期 　论文类型：期刊论文

【摘要】：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 study the relationship between the deformed surface of the explosive variable form fragment warhead and the dispersion characteristics of the fragment, the dispersion characteristics of the fragment under the constraint of the D-shaped structural plane with a diameter of 113mm were tested, and the concave was carried out by using LSDYNA software. The dispersion characteristics of fragments with convex and D shape are simulated, and the spatial distribution characteristics of fragments and the distribution of initial velocity with azimuth angle are obtained. The results show that the fragments of D type structure are mainly focused on the target direction 卤10 掳. The focusing effect of eccentric detonation is slightly better than that of central detonation, and the initial velocity of the fragment in different initiation modes is not different with the increase of azimuth, and the initial velocity of the fragment decreases with the increase of azimuth. The linear relationship between the deflecting angle of the fragment and the incident angle of detonation wave is approximately linear under different shape plane constraints. Finally, according to the characteristic of the linear relation, it is proposed that the angle of divergence deflection can be calculated with the incident angle under different shape plane. An engineering formula for calculating.
【作者单位】：中国空气动力研究与发展中心超高速所;国防科学技术大学理学院;
【基金】：国家自然科学基金资助项目(11202237)
【分类号】：O38

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