“天问一号”着陆缓冲机构吸能材料设计分析与试验验证  

Design and Test Verification of Energy Absorption Material in the Soft Landing Gear for Tianwen-1 Mars Probe

作　　者：罗敏[1] 杨建中[1] 韩福生[2] 满剑锋[1] LUO Min;YANG Jianzhong;HAN Fusheng;MAN Jianfeng(Beijing Institute of Spacecraft System Engineering,Beijing 100094,China;Institute of Solid State Physics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230021,China)

机构地区：[1]北京空间飞行器总体设计部,北京100094 [2]中国科学院合肥物质科学研究院固体物理研究所,合肥230031

出　　处：《深空探测学报（中英文）》2021年第5期472-477,共6页Journal Of Deep Space Exploration

基　　金：国家自然科学基金资助项目(51735009)。

摘　　要：着陆缓冲机构是“天问一号”火星探测器在行星表面软着陆时的关键部件之一,需要采用吸能效率高、耐高低温的能量吸收材料。介绍了火星探测器着陆缓冲机构中采用高锰奥氏体孪生诱发塑性钢(Twining Induced Plasticity,TWIP)制拉杆的能量吸收设计。给出了TWIP钢的高塑性变形微观机理和力学特性。试验结果表明,TWIP钢具备600 MPa拉伸应力和72%拉伸应变的高塑性变形能力。通过仿真分析和试验验证方法,验证了TWIP钢制拉杆在火星探测器着陆缓冲机构中的应用效果。结果表明,着陆缓冲机构能够在各种复杂着陆工况下保证稳定的能量吸收性能。The landing gear is a key component for soft-landing on Mars,which should use high energy-absorption and excellent thermal stability material to absorb the impact energy of Mars probe.The energy absorption pull rods made by directionally solidified twinning-induced plasticity(TWIP)were utilized for the soft landing gears of Mars lander.The mechanical behavior and microstructure evolution of TWIP steel were investigated.The results show that TWIP steel can sustain the high plasticity of 600 MPa ultimate true stress and 72%true strain.The landing dynamic simulation and experiment results of soft-landing gear drop testes demonstrate that that Mars landing system is able to adapt to the complex topography conditions because of the high energy absorption ability of pull rods.

关 键 词：高锰奥氏体孪生诱发塑性钢 着陆缓冲机构 深空探测 设计 能量吸收 

分 类 号：V476.3[航空宇航科学与技术—飞行器设计]