关键词: 泡沫铝, 水下爆炸, 能量耗散, 抗冲击性能, 优化设计

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

Key words: foam sandwich panel, underwater explosion, energy dissipation, impact resistance performance, optimization