【摘要】 着陆是载人航天活动的关键环节,对返回舱在接近地面时的带伞着陆过程分析具有重要意义。该文对显式积分有限元软件LS-DYNA的ALE方法进行了初步研究,探讨了其中关键控制参数对计算结果的影响。用该方法建立了返回舱带伞着陆的有限元模型,包含空气、降落伞和返回舱,用相关试验数据对模型的有效性进行了验证。结果表明,计算得到的舱体速度和姿态角与试验结果基本吻合,建立的模型可用于返回舱带伞着陆过程特性分析、着陆工况确定和降落伞对着陆冲击的影响等问题的研究。更多还原

【Abstract】 The landing process of a manned spacecraft with a parachute was analyzed using the ALE(arbitrary Lagrangian-Eulerian) finite element method in LS-DYNA to evaluate the effects of key control parameters on the simulation results.The finite element model including the manned spacecraft with the parachute and the atmospheric environment was validated with test data.The results indicate that the ALE method can be used to simulate manned spacecraft landings with parachutes.The finite element model can be used to determine the spacecraft landing conditions and to evaluate the effects of the parachute on the landing impact.更多还原