泡沫材料对冲击波的衰减特性

对冲击波与开式、闭式泡沫作用及其在空气中的传播特性开展实验研究，探讨不同结构的泡沫材料对冲击波衰减的力学特征。通过定量分析泡沫材料对冲击波的超压峰值、正冲量的损失，分析冲击波入射、反射、透射的正冲量。实验结果表明, 泡沫材料对冲击波的衰减体现在对冲击波的反射衰减等方面，其中开式泡沫对冲击波的衰减效果比闭式泡沫稍好，且它们衰减冲击波的具体力学过程也不尽相同。

Attenuation characteristics of shock waves interacting with open and closed foams

Experiments were carried out to explore the mechanical properties of the attenuation of shock waves respectively interacted with wooded plates, open and closed cellular foams. Based on the experimental data, the peak overpressure and positive impulse loss of shock waves were quantitatively analyzed as well as the positive impulses of the incidence, reflection and transmission shock waves. The experimental results show that the attenuation capacity of foams to shock waves is mainly due to the shock wave reflection and energy dissipation inside the foam microstructure. And the mechanical phenomena of open foam to shock wave are not fully consistent with those of closed foam, while the attenuation capacity of open foam to shock wave is more effective than that of closed foam.