Landing dynamic analysis for landing leg of lunar lander using Abaqus/Explicit

One of the major tasks in the design and optimization process of a new landing gear system for a lunar lander is to accurately determine the loads and energy absorption capability during the landing event. The works of this paper describes a new approach of landing impact dynamic analysis using nonlinear finite element method. Abaqus/Explicit, which is part of Abaqus suite of finite element analysis software, is selected to simulate the landing event for its excellent nonlinear, transient dynamics capabilities. The aluminum honeycomb shock absorber is modeled by plastic crushable foam material model, while the lunar soil is modeled by Drucker-Prager/Cap material model. Simulation results, including the load at connector between structure and landing gear, acceleration response of structure and dissipated energy by the shock absorber and lunar soil, are given and discussed. It shows that the performance of landing gear meets the design requirements.