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深空探测返回舱着陆冲击动力学分析
张大鹏, 雷勇军
国防科学技术大学航天科学与工程学院,长沙410073
摘要:
为分析深空探测返回舱着陆冲击动力学问题,首先建立包括返回舱及着陆土壤在内的全柔体着陆冲 击动力学分析模型,并利用“神舟号”载人飞船着陆冲击试验数据对土壤模型进行修正;然后利用非线性动力分析 软件LS-DYNA对深空探测返回舱着陆冲击过程进行仿真分析。通过典型着陆工况计算,得到了返回舱着陆过程 中姿态变化、应力分布、关键点加速度响应曲线及冲击能量分配等。仿真结果可为深空探测返回舱结构优化设计、 着陆姿态选择及地面试验等研究提供参考。
关键词:  深空探测;LS-DYNA;返回舱;着陆冲击
DOI:
分类号:V423.5
基金项目:国家自然科学基金面上项目(11272348)
Dynamic Analysis of Landing Impact for Deep Space Reentry Capsules
ZHANG Dapeng, LEI Yongjun
College of Aerospace Science and Engineering,National Univ.of Defense Technology,Changsha410073,China
Abstract:
Firstly the finite element model including the deep space reentry capsule and landing bed for dynamic analysis of landing impact is established.Then the parameters of the landing bed are calibrated according to the experimental data of Shenzhou spacecraft.The landing impact of deep space reentry capsule is simulated and analyzed by using LS-DYNA.The landing attitude change,the stress distribution,the acceleration response curves of the key point and the impact energy absorption are got according to the simulation and analyses of the landing impact in the typical working conditions.These results can provide reference to the structural optimization,the landing attitude selection and the study to ground test for deep space exploration reentry capsules.
Key words:  deep space exploration;LS-DYNA;reentry capsule;landing impact