以某舰船船底板架为应用对象，以等质量为设计原则，设计了 V-I、V-IV、U-I、Y-I、X-II 及 CT-I 型六种夹层板的结构型式及尺寸。利用有限元软件 MSC.Dytran 数值仿真分析各种类型夹层板在水下爆炸冲击载荷下的动态响应特性，得到各种夹层板的动态响应特性及变形模式。通过流-固耦合压力峰值、比冲量、塑性位移及结构吸能等力学性能的分析，比较这六种夹层板结构的防护性能。研究表明，夹芯层结构变形模式是决定夹层板防护性能的关键因素；夹芯层结构减小了传递到上面板的冲击载荷，对减小结构变形起积极作用，改善了上面板的冲击环境。夹芯层结构的吸能效率较高，夹芯层塑性压皱变形吸收了大部分能量，起到很好的防护作用。六种夹层板的动态力学性能参数随冲击因子变化均呈现出相似的趋势，其中 X-II、U-I、V-I 型夹层板结构的防护性能较优，CT-II、V-IV、Y-I 型夹层板结构的防护性能相对较差。% Taking a stiffened plate at warship bottom as an application object, six kinds of sandwich panels (V-I, V-IV, U-I, Y-I, X-II and CT-I) were designed based on equivalent mass principle. Based on MSC.Dytran, numerical simulation analysis of various sandwich panels subjected to underwater explosion load was made. Dynamic response characteristics and deformation modes of different sandwich panels were obtained. Protective performances of six kinds of sandwich panels, such as coupling pressure, impulse, plastic displacement and energy absorption was compared with each other. The results show that the core structure plays a key role in protective performance of sandwich panels. The impact environment of upper face was improved, because the impact load acting on upper face was reduced by the core structure. The core structure has high of energy absorption efficiency. Dynamic behaviors of six kinds of sandwich panels appear similar trend with the change of impact factor. The protective performance of X-II, U-I and V-I are superior to CT-II, V-IV and Y-I.
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