含泡沫铝防护结构的超高速撞击数值模拟研究

Numerical Simulation Investigation in Hypervelocity Impact on Shield Structure Containing Aluminum Foam

泡沫铝是一种新型航天器防护材料,拥有良好的抵御空间碎片超高速撞击的特性。模仿泡沫金属的生产原理,建立了泡沫金属微结构几何模型,结合自编的光滑质点流体动力学程序进行了超高速撞击数值仿真,通过与实验结果的对比,验证了模型的有效性。提出了两种含泡沫铝的空间碎片防护结构,即填充泡沫铝结构和夹层泡沫铝结构。对这两种结构分别进行了仿真计算,获得了其撞击极限曲线。分析结果表明,在空间碎片防护领域涉及的大部分撞击速度区间内,填充泡沫铝结构的防护性能优于夹层泡沫铝结构。

Aluminum foam is a new type of material for shield of spacecrafts which bears fine characteristics when subjected to hypervelocity impact of space debris.A microstructure model of geometry for metallic foams was developed to simulate their manufacturing process.Numerical simulations on hypervelocity impact were carried out using self-programmed Smooth Particle Hydrodynamics,and the proposed model is validated by comparison with experimental results.Two Al-foam-containing shield structures against space debr...