炸药样品在落锤撞击下,其分幅图像具有分形结构,同时,它的分形维数与炸药感度有关。根据分形几何的周长—面积公式及线性回归原理,对TATB等六种炸药的落锤试验的分幅图像进行了图像处理和分形维数计算。结果发现,越钝感的炸药,分形维数越大。而且,六种炸药分形维数的排序与它们的50％爆炸特性落高的排序是一致的。因此,用炸药的分形维数来鉴别撞击感度是基本可行的。 Under the impact of drop hammer, the explosives sample has a fractal structure, and its fractal dimension is related to the sensitivity of the explosive. According to the perimeter-area formula of fractal geometry and the principle of linear regression, the image processing and fractal dimension calculation of the drop images of six kinds of explosives such as TATB were carried out. The results showed that the more insensitive explosives, the larger the fractal dimension. Moreover, the ordering of the fractal dimensions of the six explosives is consistent with the order in which their 50% explosion characteristics fall. Therefore, the fractal dimension of explosives to identify impact sensitivity is basically feasible.