基于瞬态动力学方法的月球探测器软着陆腿着陆冲击性能分析  

Analysis of the Landing Impact Performance for Lunar Landing Leg with Transient Dynamic Method

作　　者：万峻麟[1] 聂宏[1] 李立春[1] 陈金宝[1] 曾福明[2] 

机构地区：[1]南京航空航天大学飞行器先进设计技术国防重点学科实验室,江苏南京210016 [2]中国空间技术研究院总体部,北京100094

出　　处：《兵工学报》2010年第5期567-573,共7页Acta Armamentarii

基　　金：国家"863"计划项目(2009AA04Z405)

摘　　要：月球探测器着陆冲击性能是月面软着陆的关键。以月球探测器铝蜂窝缓冲软着陆腿为研究对象,基于瞬态动力学方法,对其2级铝蜂窝缓冲器进行了建模和缓冲性能验证;建立了铝蜂窝软着陆腿瞬态动力学分析模型,并进行了单条软着陆腿着陆冲击仿真分析,研究了结构响应对软着陆腿着陆冲击性能的影响。结果表明:该瞬态动力学分析模型的缓冲器能量吸收、缓冲行程和探测器机体加速度响应峰值等分析结果与实验符合较好;2级蜂窝缓冲软着陆腿着陆过程中,当第2级蜂窝开始压缩时探测器机体加速度响应最大;软着陆腿结构柔性变形及储能导致了软着陆腿着陆性能恶化。The landing impact performance of lunar lander is the key factor to soft-land on lunar surface. The soft-landing leg based on Al-honeycomb shock absorber is taken as the study object. The model of two-stage Al-honeycomb shock absorber system for the soft-landing leg is built,then the buffer performance of this model is validated with transient dynamics method. The transient dynamics model of the softlanding leg is established. The landing impact performance of single soft-landing leg is analyzed, and the influence of structural response for the soft-landing leg on landing impact performance is studied. The results show that analysis results have good agreement with test data in some important aspects, such as stroke displacement, energy absorption, acceleration response and its peak value of lunar lander. The impact acceleration of lunar lander is the largest at the beginning of the secondary honeycomb compressing for shock absorber. The landing impact performance of soft-landing leg is aggravated by the elastic deformation and energy absorption of soft-landing leg structure.

关 键 词：航天器结构与设计 月面着陆 缓冲器 瞬态动力学分析 航天器仿真 

分 类 号：V47[航空宇航科学与技术—飞行器设计]