软着陆足垫与模拟月壤界面特性研究

发布时间：2017-12-31 20:23

本文关键词：软着陆足垫与模拟月壤界面特性研究　出处：《岩土力学》2013年04期 　论文类型：期刊论文

【摘要】：软着陆机构与模拟月壤滑移性能是影响月球探测器月面软着陆稳定性的重要因素。针对缓冲机构所用足垫材料-硬铝,通过直剪仪开展界面直剪试验,研究不同法向应力和剪切速率下不同相对密度模拟月壤和光滑铝板间的接触面变形、强度特性。试验结果表明,稍密时接触面无明显剪应力峰值,近理想弹塑性变形;密实条件下接触面破坏时呈现应变软化现象;法向压力增加接触面强度增加,接触面强度随剪切速率增加而降低,接触面摩擦角取26.8°～31.4°之间。
[Abstract]:Soft landing mechanism and Simulation of lunar soil slip performance is an important factor affecting the stability of the lunar soft landing on the lunar surface. According to the buffer mechanism for foot pad material - aluminium, through direct shear apparatus to carry out interface direct shear test of different normal stress and shear rate under different relative density of simulated lunar soil and the contact surface between the smooth aluminum plate the deformation and strength characteristics. The experimental results show that when the contact surface is slightly dense without obvious peak shear stress, nearly ideal elastic-plastic deformation; compacting under the condition of the contact surface damage of strain softening phenomenon; method to increase the contact surface pressure intensity increase, the shear strength decreases with the increase of the shear rate, the contact surface between the friction angle from 26.8 degrees to 31.4 degrees.

【作者单位】：浙江大学软弱土与环境土工教育部重点实验室;深圳市工勘岩土工程有限公司;北京空间飞行器总体设计部;
【基金】：国家自然科学基金资助(No.51278451) 浙江省自然科学基金资助(No.LZ12E09001)
【分类号】：P184.5
【正文快照】： 1引言月球探测器安全平稳着落月面,是月面软着陆成功的标志。软着陆机构在月壤中的滑移特性是影响着陆稳定性、保证探测器不翻滚的重要因素之一[1]。在月球弱重力环境下,着陆冲击过程中着陆腿刺入月壤深度有限,足垫处月壤自重压力较小,不同接触速率下足垫与模拟月壤间的接触

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