关键词: 支腿式着陆装置, 缩比模型, 相似性分析, 碰撞, 垂直降落, 运载器

Abstract: For the purpose of saving the cost of complete-machine experiments, realizing the inversion to landing process of the prototype from the test of scaled-down model of vertical-landing carrier, and facilitating the research of vertical landing carrier, the scaled model of the landing process of vertical-landing carrier is established using similarity analysis theory, which can quantitatively reflect the dynamic behavior of the landing process of prototype carrier. The analytical models are established for two typical dynamical behaviors – collision stage and buffering stage. Taking speed jump and impact force as the analysis goal for the collision process, the discrete and continuous(elastic and elastoplastic models included) collision models are developed, and the dimensional analysis method together with the equation analysis method is applied to derive the similarity criterion and reveal the proportional relationship of mechanical quantities between prototype and scaled-down model. The simulations of the landing process of the prototype and the scaled-down model are carried out to verify the dynamics and kinematics similitude of the discrete and continuous elastic collision, the buffering process and the landing process. The simulation results are highly consistent with the theoretical derivations, which provides theoretical basis for the design of scaled-down model and equivalent experiment of the vertical-landing carrier.

Key words: legged landing mechanism, scaled-down model, similarity analysis, collision, vertical-landing, carrier