Experimental and numerical investigations on cylindrical shell panels subjected to underwater explosion loading are presented. Experiments were conducted on panels of size 0.8 × 0.6 × 0.00314 m and shell rise-to-span ratiosh/l= 0.0, 0.05, 0.1 , using a box model set-up under air backed conditions in a shock tank. Small charges of PEK I explosive were employed. The plastic deformation of the panels was measured for three loading conditions. Finite element analysis was carried out using the CSA/GENSA [DYNA3D] software to predict the plastic deformation for various loading conditions. The analysis included material and geometric non-linearities, with strain rate effects incorporated based on the Cowper-Symonds relation. The numerical results for plastic deformation are compared with those from experiments.
提供了关于受水下爆炸载荷作用的圆柱壳板的实验和数值研究。实验是在尺寸为0.8×0.6×0.00314米的板上进行的,壳升跨比h/l=0.0、0.05、0.1,使用了一个在冲击槽中空气支撑条件下设置的箱模型。采用了PEK I炸药的小量装药。对三种加载条件下的板的塑性变形进行了测量。使用CSA/GENSA[DYNA3D]软件进行有限元分析,以预测不同加载条件下的塑性变形。分析包括材料和几何非线性,根据Cowper-Symonds关系考虑了应变速率效应。数值结果的塑性变形与实验结果进行了比较。