填充式波纹夹层结构超高速撞击特性仿真

基于航天器空间碎片被动防护需求,对一种新型填充式波纹夹层结构进行超高速撞击仿真研究,分析超高速撞击过程以及结构的穿孔破坏情况和所形成的碎片云的特性,并与相同面密度Whipple结构进行对比。其撞击现象与Whipple结构相似,但其碎片云的头部速度小于Whipple结构,而径向膨胀最大速度和膨胀半角均大于Whipple结构。随撞击初速从3 km/s~10 km/s不断增大,波纹夹层结构的撞击穿孔尺寸变大,形状也更不规则。此外,结构中的填充树脂对碎片撞击能量的吸收贡献最大,后面板所吸收的能量所占比重较大,而前面板和波纹板对碎片撞击能量的吸收贡献较小。研究结果对空间碎片防护结构的设计具有一定的参考意义。

Simulation on Hypervelocity Impact Characteristics of the Stuffed Corrugation-cored Sandwiches

Based on the demand of the spacecraft protection against the orbital debris, numerical simulation of a new designed stuffed corrugation-cored sandwich under hypervelocity impact was carried out. The hypervelocity impact process was obtained and thereby the perforation of the sandwich and the characteristics of the debris cloud were analyzed. It can be seen that the phenomenon of stuffed corrugation-cored sandwich under hypervelocity impact is familiar with that of Whipple structure, but the head velocity of the debris cloud is lower and the expansion velocity and expansion angle is larger. With the impact velocity increasing from 3 km/s to 10 km/s, the size of the sandwich perforation increases accordingly and the shape of the perforation becomes more irregular. Furthermore, the epoxy stuffed in the sandwich absorbs most impact energy of the debris while the front plate and the corrugation core absorb fewer energy. The research can provide some references for the design of orbital debris shield.