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中文摘要：
针对登月着陆器发动机下降过程中羽流场与月壤颗粒相互作用问题提出了一种新的计算方法。通过Morh—Coulomb破坏准则确定月壤颗粒可以被羽流扬起的临界剪应力，采用动量原理计算被扬起的月壤颗粒的质量大小及形成的月坑深度；基于牛顿第二定律，采用羽流场与月壤颗粒的流固耦合相互迭代的计算方法，获得被扬起月壤颗粒随时间的质量分布等。本文通过美国Apollo11登月过程实测数据对该新方法进行了验证，为人类探月工程提供一定数据参考。
英文摘要：
A new method is presented on interaction between plume and Lunar soil particles in the course of Lunar lander engines declined on the Moon. The critical shear stress of Lunar soil particles raised up by the plume filed can be determined based on Morh-Coulomb failure criterion. The quantities of Lunar soil particles and the depth of craters formed can be calculated by using momentum theory. Based on Newton＇ s second law, iterative computing method of the fluid-solid coupling between plume and Lunar soil particles can by used to get mass distributions of Lunar soil particles over time. The new method is verified by the measured data of United States Apollo 11, and it could be available for lunar exploration program.
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