水下爆炸冲击载荷下波纹夹芯板动态响应及结构优化设计

Studying the dynamic response and impact-resistance performance of corrugated sandwich panels subjected to underwater explosion impact loads is of great significance for improving the underwater protection capability of ship structures. The underwater shock loading device was used to conduct experiments on corrugated sandwich panels. Based on ABAQUS, a fluid-solid coupling finite element model was established to simulate the experiment. The error between the simulation value and the experimental value of the peak pressure at the measuring point did not exceed 4.55%, and the error between the simulation value and the experimental value of the central displacement of back panel was only 0.8%. Using the central displacement of back panel and the specific energy absorption of sandwich panel as impact resistance performance indicators, taking into account six structural parameters of corrugated sandwich panel that affect panel thickness and core layer shape, the effect of each parameter on impact resistance was analyzed based on simulation. A surrogate model for impact-resistance performance and structural parameters of corrugated sandwich panels was established based on the Kriging model. Using the NSGA-II algorithm, the multi-objective optimization design of the back panel central displacement and sandwich panel specific energy absorption was carried out. The central displacement of back panel was reduced by about 23.57% and the specific energy absorption of sandwich panel was increased by about 27.91% on average.