In the design of planetary sampling devices, calculating the reaction force acting on the sampling devices is crucial. According to related research, the influence zone caused by sampling plays an important role in calculating the reaction force. A new method for estimating the range of the influence zone based on 3D DEM simulation is discussed in this paper. Taking lunar soil as an example, first, via validation of physical experiments, the DEM lunar soil simulant was proven to have mechanical properties similar to those of real lunar soil. Second, stress was selected as an indicator to identify the influence zone by computing the match percentage via a comparison between classical soil mechanics and DEM simulation. Using the proposed calculation method, it can be observed that the trend of change of influence zone at different sampling moments showed similar to the change of reaction force. Calculation of the influence zone can be used to analyze the reaction force of different gravity environments, sampling device structures, and motions.

中文翻译：

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基于DEM仿真的行星采样影响区的计算。

在行星式采样设备的设计中，计算作用在采样设备上的反作用力至关重要。根据相关研究，采样引起的影响区在反作用力的计算中起着重要作用。本文讨论了一种基于3D DEM仿真的影响区域范围估计的新方法。以月球土壤为例，首先，通过物理实验的验证，DEM月球土壤模拟物被证明具有与真实月球土壤相似的机械性能。其次，选择应力作为指标，通过比较经典土壤力学和DEM模拟来计算匹配百分比，从而确定影响区域。使用建议的计算方法，可以看出，在不同采样时刻，影响区的变化趋势与反作用力的变化相似。影响区的计算可用于分析不同重力环境，采样装置结构和运动的反作用力。