水下爆炸载荷下小型目标变形及冲击损伤试验

采用双腔内部填沙圆柱壳体(硬模型)模拟含内部装填物的水下实体结构，对圆柱壳体在水中受球形三硝基甲苯（TNT）炸药产生的冲击载荷作用下的动力响应过程及其冲击破坏进行研究.对不同装药量、爆炸距离和爆炸方位下的内部填沙圆柱壳体目标与空壳目标（软模型）进行了爆炸冲击试验，并将内部填沙圆柱壳体与空壳圆柱壳体在相同爆炸条件下的试验结果进行比较.结果表明，相同爆炸条件下，填沙圆柱壳体比空壳圆柱壳体抗爆能力强，填沙圆柱壳体模型的冲击破坏主要集中于仪器舱段，装药舱段很难破坏，空壳圆柱壳体的冲击破坏主要发生在较薄的主舱段，表现为壳体表面轴向撕裂.

Experimental Study on Deformation and Shock Damage of Small Target Subjected to Underwater Explosions

Cylindrical shell is the key part in ships and offshore structures, and accurate prediction of the dynamic response and shock damage of the cylinder model makes good sense. In this paper, a cylindrical shell consisting of twin cavities was designed to simulate the structure with stuffing, which is called hard model compared with the soft model without sand inside. The dynamic responses and shock damages of the test models subjected to underwater shock wave loadings detonated by spherical TNT explosives were investigated. Different tests were conducted by changing the TNT charge weight, standoff distance, explosion position and model type. Furthermore, the experimental results are compared. Detailed discussions on experimental results show that the dynamic responses and damage modes are much different; the hard cylindrical shell has better resistance than the soft one when exposed to underwater explosion. The shock damage is mainly observed at the instrument capsule of the hard model while the main capsule of the soft one manifests axial tearing of the shell.