采用泡沫铝填充薄壁结构的穿透器缓冲防护研究

Study on Buffer Protection for Penetrator with Aluminum Foam-Filled Thin-Wall Structure

携带探测仪器的穿透器高速侵彻行星体,内部科学仪器将受到高g值冲击,极易损坏.为了科学仪器的缓冲防护以提高自身存活率,本文设计了一种具有多层能量吸收结构的穿透器样机,将泡沫铝填充薄壁结构(简称FTS)应用于内部载荷的缓冲防护设计上以提高存活率.在LS-DYNA中模拟了穿透器侵彻星球介质的过程,通过冲击试验和仿真分析验证了该种措施的有效性.研究结果表明:FTS对隔离冲击和能量吸收效果明显,为穿透器工程样机的研发提供了重要的解决方案.

When a high-speed penetrator carrying detection equipment penetrates planetary bodies at high speed,the scientific instruments in it are impacted by high g value and easily damaged.The buffer protection structure for scientific instrumentation is essential for improving the survival rate.This work suggested a penetrator with a multi-layered energy absorbing structure where the foam-filled thin-wall structure(abbreviated as FTS)is applied to the penetrating vibration-damping structure to improve the survival rate of the penetrator.The penetrating process of the penetrator into the planetary medium is simulated in LS-DYNA.Then,the reliability of the penetrator’s finite element model was verified by the impulse response test and simulation.The results suggest that FTS has a beneficial effect on isolation impact and energy absorption and provides an important solution for the research and development of penetrator engineering prototype.