聚脲涂层蜂窝夹芯板的抗爆性能优化OA

Honeycomb sandwich panels are widely used in aerospace,shipbuilding,and construction due to their excellent mechanical properties,thermal insulation,and soundproofing characteristics.To enhance the blast resistance of these panels,numerical simulations were conducted to analyze the impact of different honeycomb geometric structures(quadrilateral and hexagonal)and the positions of the polyurea coating(faceplate,backplate,and both sides)on the deformation behaviors of the structure under blast shock.The simulation results were compared with experimental data to validate the accuracy of the numerical models.For multi-objective optimization design,the non-dominated sorting genetic algorithm II(NSGA-II)was used with honeycomb wall thickness,Q235 steel plate thickness,and polyurea layer thickness as design variables.The optimization objectives were to maximize core energy absorption and minimize backplate deformation.The results demonstrate that the application of polyurea coating on faceplate and both sides significantly enhance the structural strength.Compared to the conventional honeycomb sandwich structure without polyurea coating,the maximum displacement of the backplate is reduced by 43.7%,while backplate-only coating shows limited improvement in blast resistance.Design parameters such as honeycomb core wall thickness and polyurea layer thickness significantly influence the blast resistance of the sandwich panel.Building on the baseline model,an optimization of the polyurea-coated honeycomb core structure was performed.The results indicate that the relationship between the maximum displacement of the backplate and the optimal energy absorption of the core layer is approximately linear.Based on the requirement of minimal displacement of the backplate in practical applications,an optimal solution is selected,which reduce the backplate's maximum displacement by 30.2%,while ensuring the core layer's energy absorption capacity,further enhancing the structural strength.