柔性导爆索在铝合金圆筒中能量输出特性实验研究

柔性导爆索（MDF）是线式爆炸分离装置的能量来源，其在圆筒结构中的能量输出特性在保护罩设计中具有重要意义.为评估柔性导爆索类小药量装药的能量输出效率，设计并开展了变形圆筒实验.将外径为2.94 mm的柔性导爆索，置于长为100 mm，内径为3.2 mm，外径分别为20.0，21.9和24.0 mm的3种铝合金圆筒中进行实验，测量了圆筒外表面的质点速度和回收试样的内外径.基于材料的全塑性变形假设，计算了铝合金圆筒在MDF内部爆炸加载下的塑性应变能，进一步计算了柔性导爆索转化为塑性应变能的能量输出效率，分别为62.3%、61.3%和60.9%.

Experimental Study on Energy Output Efficiency of Mild Detonating Fuse in Aluminum Alloy Cylinder Tube

Mild detonating fuse (MDF) plays a vital role in linear explosive separation devices. Energy output efficiency of mild detonating fuse in cylinder tube has significances to the structure design of retainer of protecting. To estimate the energy output efficiency of mild detonating fuse, a deformation cylinder tube testing set for small counts of explosive charges was developed. Three kinds of aluminum alloy tubes with the same inner diameter (3.2 mm), the same length (100 mm) and different outer diameters (20.0, 21.9 and 24.0 mm) were used in the tests, which were loaded by a MDF with outer diameter of 2.94 mm. The particle velocities histories of outer surface and deformation results of recycled specimen were measured. Plastic strain energy of the deformation cylinder tube can be calculated based on the all-plastic assumption. The energy output efficiencies of the MDF in three aluminum alloy cylinder tubes are 62.3%, 61.3% and 60.9%, respectively.