Abstract： Choosing a scaled stiffened cylindrical shell model as simulation object, the simulation model of stiffened cylindrical shell subjected to underwater explosion load is built by using MSC-DYTRAN finite element analysis software, the typical test conditions which shock factor is 1.1 is simulated, the damage properties of stiffened cylindrical Shell is analyzed, numerical results are compared with experimental data, it is proved that the simulation method is effective and feasible. By performing a series of numerical experiments, the influence of attack angle of explosive and submergence depth of model on the elastic-plastic dynamic response were investigated. It is shown that angle of 90°is the most serious attack angle, angle of 0°is less serious than other angle; the submergence depth of stiffened cylindrical shell has obvious influence on dynamic response, the more deep cylindrical shell is, the more serious cylindrical shell is damaged. When considering the bubble pulse load, the structure can be destroyed once more. With the same explosive mass and distance, the destroy effect of the stiffened cylindrical shell at different submergence depth is different, the more deep cylindrical shell is, the more serious cylindrical shell is damaged once more.
2012, Vol. 31 
