月壤取芯钻具热特性有限元分析

The Finite Element Analysis of Thermal Property for Lunar Soil-Drilling Sampler

根据取芯钻具的特点、使用情况以及空间环境要求,在简化模型的基础上,利用有限元分析方法研究了月壤取芯钻具的热特性。首先计算了取芯钻具在飞行阶段高、低温存储环境影响下的变形和应力分布;其次计算了取芯钻具在工作阶段不同钻进条件下的变形及应力分布情况,提取了关键点的温度和位移参数;最后研究了取芯软袋与取芯管之间的间隙变化情况。根据有限元分析得到的数据结果,证明了各部位选择的材料以及配合间隙等满足要求,可为未来工程应用提供理论依据。

According to the characteristic and service conditions of the core-drilling device and the requirement of space environment, the deformation and stress distribution of the device were computed at low and high temperatures in store stage with the finite element analysis method based on the simplified model, then deformation and stress distribution of the device under different drilling conditions were also computed, and the temperature and displacement of key points were obtained. Finally, the temperature of sealer and the tolerance between the core pipe and soft bag were also simulated and the tolerance. And the results show that the material of each component and the designed fit clearance can meet the engineering requirements. It can provide theoretical basis for future engineering application.