箔条干扰弹动态抛撒云团空间分布研究

箔条在现代战场的电子对抗中被广泛应用,其云团的散布问题已得到了深入的研究及发展,但现有模型不能够准确地预测高牵连速度下箔条云团的散布形态及分布规律。为了明确实战中箔条弹动态抛撒下云团散布及云团内部箔条分布规律,以刚体动力学模型和碰撞概率模型为基础,对牵连马赫数为0.8的箔条干扰弹动态抛撒过程进行了数值模拟,并开展试验验证了计算模型的准确性和有效性。研究表明,牵连速度对云团散布有重要影响,箔条云的散布成型可以在0.1 s内完成,0.3 s后云团内部各方向上箔条的数量分布情况基本不再变化,仿真与试验中箔条云团的形态及大小基本吻合,得出箔条云团轴向截面由锥形向矩形变化的分布规律。各方向上云团边界值的发展趋势在0.3 s前后有明显不同,且0.3 s后云团质心速度不再改变,云团整体进入沉降阶段。载体火箭飞行方向上不同位置的箔条速度相差较大,在该方向上箔条位置分布的不均匀性较为明显。研究结果可为不同牵连速度下的箔条动态抛撒散布研究提供理论依据。

Study on Space Distribution of Chaff Cloud with Dynamic Releasing

Chaff is widely used in electronic warfare in modern battlefield. Although the problem of cloud distribution has been deeply studied and developed,the existing models can not accurately predict the dispersion pattern and distribution law of chaff cloud at high implicated velocity. In order to make clear the distribution law of chaff cloud and chaff distribution law inside the chaffs cloud under the dynamic releasing in actual combat,based on the rigid body dynamics model and collision probability model,dynamic releasing of chaffs with an implicated velocity of Ma=0.8 was numerically simulated. Experiment was carried out to verify the accuracy and effectiveness of the calculation model. The results show that the implicated speed has an important influence on the dispersion of the chaff cloud. The dispersion of the chaff cluster can be completed within 0.1 s. After 0.3 s,the quantity distribution of chaffs is stable in each direction within the cloud. The shape and size of the chaff cloud in the simulation show good agreement with those in the experiment. The distribution law of the axial section of the chaff cloud from cone to rectangle was obtained. The development trend of cloud boundary value in each direction is obviously different before and after 0.3 s. The cloud centroid velocity is stable after 0.3 s,and the whole cloud enters the settlement stage. The velocity of chaff at different positions in the direction of rocket flight is quite different,and the non-uniformity of the position distribution of chaffs in this direction is obvious. The result can provide a theoretical basis for the research of chaff dynamic releasing and dispersion under different implicated speeds.