Research on protective performance of sandwich panel can guide design of warship protective structures. Taking a warship bottom stiffened plate for example, U-type corrugated cores sandwich panel was designed. Based on MSC.Dytran, the numerical simulation analysis of stiffened plate and sandwich panel subjected to underwater explosion load was made. The protective performance of stiffened plate, such as coupling pressure, damage deformation, velocity, acceleration and energy absorption, was compared with sandwich panel. Then the damage characteristics of sandwich panel under different impact strength were studied. In addition, the structural parameter influence on damage characteristics of sandwich panel was an-alyzed. The damage characteristics and deformation modes of U-type corrugated cores sandwich panel sub-jected to underwater explosion load are obtained. The results show that the protective performance of sand-wich panel is superior to the traditional stiffened plate. The U-type core plays a key role in resisting un-derwater explosion load. In addition, structural parameters have effects on protective performance to some extent.%开展夹层板单元防护性能研究可为舰船防护结构设计提供指导。以某船底加筋板架为应用对象，设计出U型折叠式夹层板结构；利用MSC.Dytran对船底板架及夹层板结构在水下爆炸冲击载荷下的动态响应进行数值仿真分析，通过分析流-固耦合压力、损伤变形、速度、加速度、结构塑性吸能等性能参数，对比研究两结构的防护性能；分析夹层板在不同冲击强度下的损伤特性，面板厚度、夹芯板厚、夹芯与面板夹角、夹芯单元宽度、夹芯高度等结构参数对夹层板损伤变形、结构吸能等特性的影响。通过研究得到了U型夹层板在水下爆炸冲击载荷下的损伤特性、变形模式等，U型夹层板的防护性能明显优于传统加筋板架，夹芯层在夹层板抵抗水下冲击载荷中起到关键作用，结构参数对防护性能产生不同程度的影响。
展开▼
