Volume 35 Issue 4
Jul.  2015
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ZHENG Gang, CUI Yuhong, YU Wei, REN Depeng, YE Qing, GENG Dongliang. Method on Calculation of Lunar Soil Particles Trajectories Considering Collision Effect[J]. Chinese Journal of Space Science, 2015, 35(4): 486-494. doi: 10.11728/cjss2015.04.486
Citation: ZHENG Gang, CUI Yuhong, YU Wei, REN Depeng, YE Qing, GENG Dongliang. Method on Calculation of Lunar Soil Particles Trajectories Considering Collision Effect[J]. Chinese Journal of Space Science, 2015, 35(4): 486-494. doi: 10.11728/cjss2015.04.486

Method on Calculation of Lunar Soil Particles Trajectories Considering Collision Effect

doi: 10.11728/cjss2015.04.486
  • Received Date: 2014-07-26
  • Rev Recd Date: 2015-04-14
  • Publish Date: 2015-07-15
  • Regarding to the trajectory and mass distribution of lunar soil particles which are lifted by the lunar lander during the descending stage, a method considering the particles' collision effect is proposed. Based on the law of mass and energy conservation, the speed of regolith particles after collision is determined, and through the iterative calculations of fluid-structure interactions, the mass distribution caused both by collision effect and lunar lander effect on the lunar soil particles is presented. Through the measured data from the US Apollo 11 descending and landing on the lunar surface, the method are tested and verified by the numerical simulation. The analysis result shows that after the regolith particles colliding with each other having been considered, their trajectories have a more obvious tendency to spread. Furthermore, after the collision energy loss having been considered, the tendency to spread of regolith particles is weakened. And the smaller the coefficient of restitution is, the lower the raising height of the lunar soil particle will be.

     

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