Analysis of damage effect of cabin under the combined action of shock wave and fragmentation
In order to study the damage effect of the ship cabin under the combined action of shock waves and frag-ments,the finite element model of the cabin was first established in the software ANSA,and the material model,side breach simulation,warhead model and coupling model were set reasonably.Then,in the software AUTODYN,the differences in the numerical results of the explosion load characteristics in the cabin,the equivalent plastic strain and displacement of the cabin structure under the two conditions of the explosion shock wave alone and the combined action of the shock wave and the fragments were compared and analyzed.The results show that when considering the combined action of shock wave and fragments,the early trend of the shock wave pressure curve is roughly the same as that of the shock wave alone,but due to the shock wave leaking from the breach,the pressure in the cabin will reach the quasi-static pressure state earlier.At the same time,large cracks appeared in more areas of the cabin during the explosion,and the damage is mainly manifested as large plastic deformation of the corners and large-area tearing of the edges.The maximum displacement and equivalent plastic strain of the deck and side are also much larger than those of the shock wave alone.
万方数据
维普
