Research on Aluminum Honeycomb Buffer Device for Soft Landing on the Lunar Surface

Table 1

Discrete element parameters of cobweb honeycomb.

Models	Figures	Introduction
Bonding bond model		A columnar bonding bond is formed between the center positions of the particles to connect the particles. The bonding bond can record the force between the particles and reflect the transfer process of the force and motion state.
Discrete element model of aluminum honeycomb and its bonding structure		A suitable model is established according to the parameter ratio of the aluminum honeycomb panel, and the honeycomb particles are connected to form aluminum honeycomb panel, through the bonding bonds between the particles
Discrete element model of three-dimensional spider web honeycomb		Array the position points of a single honeycomb in the vertical and horizontal directions to obtain the position coordinates of all the particles on the honeycomb board, establish the corresponding particle model in EDEM, and obtain the discrete element model of the uncut single-layer honeycomb board. Establish a stamping die complementary to its shape, import it into the EDEM, and use the die to impact the single-layer honeycomb panel to obtain a spiderweb-like cushion honeycomb structure.
Single spherical grain lunar soil model		The lunar soil is modeled by an axial and radial magnification step by step, and the lunar soil particles with a smaller radius are formed at the positions directly contacted during the impact. In the axial and radial directions away from the impact point, the particle size of the lunar soil is gradually enlarged. In lunar soil spherical particles of different sizes and radii, the thickness of the lunar soil also shows a progressive relationship, achieving a full reduction in the number of model particles
EDEM lander-honeycomb-lunar soil coupling model		Based on the established lunar soil model, the lander prototype was imported into the lunar soil discrete element model according to certain reference system rules.