论文部分内容阅读
以卫星球形贮箱为研究对象,用任意拉格朗日-欧拉(ALE)法建立了数学模型,给出了计算的基本方程,并基于MSC-Dytran有限元程序,对常重力和微重力环境中贮箱内推进剂的晃动进行了数值模拟。结果表明,微重力环境中液体更易发生大幅晃动,甚至产生飞溅,工程中常用的等效力学模型已不再适用,而有限元数值模拟方法可较好地解决该问题,为卫星及大充液复杂结构航天器控制系统的设计和分析提供理论参考。
Taking the satellite spherical tank as the research object, a mathematical model was established by using arbitrary Lagrange-Euler (ALE) method and the basic equations of calculation were given. Based on the MSC-Dytran finite element program, the gravity and microgravity The shaking of the propellant in the tank in the environment was numerically simulated. The results show that the liquid in the microgravity environment is more prone to sway and spatter even more, and the equivalent mechanical model commonly used in engineering is no longer applicable. However, the numerical simulation method of the finite element method can solve the problem well. The design and analysis of complex structure spacecraft control system provide theoretical reference.