泡沫铝夹芯板在水中冲击载荷作用下的动态响应与能量耗散

The dynamic response and energy dissipation mechanism of foam aluminum sandwich panel under underwater impulsive load are analyzed to provide a scientific basis for the protection design of ships and marine engineering structures. The consistency between the test and simulated results is verified through the underwater explosion equivalent impact test and simulation. The influences of structural parameters,such as core layer mass ratio,panel thickness,foam aluminum density and impact load on the impact resistance of sandwich panels are quantified. Multi-objective optimization of sandwich panel structure is carried out using neural network and genetic algorithm. The results show that the foam aluminum sandwich panels subjected to underwater impact loading exhibit the deformation patterns such as local collapse and boundary shear. When the mass of sandwich panel is constant,there exists an optimal core layer mass ratio and an optimal wet panel thickness, which increase with the increase of dimensionless impulse. As the thickness of wet panel and the density of core layer decrease,the energy absorption efficiency of the compression deformation of core layer increases. The optimized sandwich panel has significantly reduced deformation and mass.