Abstract: For the problem of spacecraft spherical tank sloshing with large probability of liquid fracture, the smoothed particle hydrodynamics (SPH) method was selected for modeling analysis. The NS equations were discretely approximated, and the kernel function, stress tensor, boundary problem, neighborhood particle search were selected respectively. The calculation process finally leads to a fluid dynamics model based on the SPH method. By establishing the simulation model of different fuel liquid volumes and baffle mounting positions, the force and local pressure of spacecraft spherical tank were analyzed by simulation. By recording the force and setting the pressure of the measuring point, the influence of different simulation parameters was analyzed and the corresponding laws were finally obtained. The result can provide the technical basis for the design of spacecraft spherical tank.

Key words: liquid sloshing problem, Smoothed Particle Hydrodynamics method, spherical tank, parametric impact analysis, dynamic analysis