| 着陆器足垫垂直冲击模型试验研究 |
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| 引用本文： | 吴晓君,钟世英,凌道盛,陈云敏.着陆器足垫垂直冲击模型试验研究[J].岩土力学,2012,33(4):1045-1050. |
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| 作者姓名： | 吴晓君 钟世英 凌道盛 陈云敏 |
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| 作者单位： | 1. 浙江大学 软弱土与环境土工教育部重点实验室，杭州 310058；2. 苏州新港建设集团有限公司，江苏 苏州 215011 |
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| 摘 要： | 着陆器着陆过程中会产生巨大的冲击作用，影响其内部精密仪器的正常工作。因此，研究着陆器足垫与土体相互作用对着陆器软着陆具有重要意义。基于对着陆过程的研究，将问题分解为垂直冲击和水平滑动两个方向的运动，并通过力的平衡和动量定理建立了垂直冲击的动力模型。利用独立研发的垂直冲击模型试验装置，探讨了冲击过程中土体密实度、冲击速率和冲击质量等对足垫刺入深度、最大轴力和最大加速度等的影响。分析结果表明，足垫刺入深度和最大轴力都随着冲击能量的增大而增大，并且逐渐趋于平稳。土体越密实、冲击质量越小，足垫加速度峰值则越大。试验结果还与动力模型进行了对比，结果表明，动力模型能合理地反映出着陆器在垂直冲击阶段的动力特性。
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| 关 键 词： | 着陆器 垂直冲击 动力模型 模型试验 |
| 收稿时间： | 2010-10-14 |
Model test study of vertical impact of space lander footpad |
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| WU Xiao-jun
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ZHONG Shi-ying
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LING Dao-sheng
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CHEN Yun-min.Model test study of vertical impact of space lander footpad[J].Rock and Soil Mechanics,2012,33(4):1045-1050. |
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| Authors: | WU Xiao-jun ZHONG Shi-ying LING Dao-sheng CHEN Yun-min |
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| Institution: | 1. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, China; 2. Xingang Construction Group Co., Ltd., Suzhou, Jiangsu 215011, China |
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| Abstract: | The interaction between footpad and soil is of great importance due to the strong impact produced during the brief period of the space lander touchdown which will affect the normal operation of the inner precision instrument.Based on the study of the landing process,the problem can be decomposed into two phases,vertical impact and horizontal sliding.A dynamic model of footpad and soil interaction is built through force balance and momentum theorem.Lots of vertical impact tests are conducted in the self-designed model test system.The soil density,impact velocity and impact mass are varied to investigate their influences on the penetration depth,the maximum axial force and acceleration of the footpad.It is concluded that the penetration depth and maximum axial force increase with impact energy increases,and tend to be stable.The denser soil is and the smaller impact mass is,the greater the maximum acceleration is.The test results are compared with dynamic model;it is proved that the dynamic model can reasonably reflect the dynamic characteristics of the lander during vertical impact. |
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| Keywords: | space lander vertical impact dynamic model model test |
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