爆炸成型弹丸贯穿靶板靶后破片空间分布模型

深空撞击载荷对探测小天体内部物质成分和结构特性具有重要意义,因此,在考虑爆炸成型弹丸(explosively formed projectile, EFP)可变截面的特性和区分靶后破片来源的基础上,建立了EFP贯穿靶板靶后破片空间分布模型。在靶板厚度30 mm至70 mm、EFP着靶速度1 650 m/s至1 860 m/s的条件下,该模型可以定量预测靶后破片云中各个破片的速度、质量、数量与空间位置的关系。结果表明,相对速度总是随相对空间位置的增加而呈线性增加,相对质量、相对数量总是随相对空间位置的增加而呈幂函数增加。

Spatial distribution model for behind-armor debris formed by the perforation of explosively formed projectile through target

The deep space impact load is of great significance to the detection of the internal material composition and structural characteristics of small celestial bodies. Therefore, based on considering the characteristics of the variable section of EFP (explosively formed projectile) and the differentiation of the BAD (behind-armor debris),a spatial distribution model for BAD formed by the perforation of variable cross-section EFP through the target was established. Under the condition that the target thickness is 30 mm to 70 mm and the EFP speed is 1 650 m/s to 1 860 m/s, the model can quantitatively predict the relationship between the velocity, mass, quantity and spatial position of each debris in the BAD cloud.The results indicate that the relative velocity increases by a linear function with the increase of the relative spatial position, the relative mass and the relative number increase by a power function with the increase of the relative spatial position.