基于伞载多体动力学的降落伞开伞过程研究

Research on Parachute Opening Process Based on Parachute Payload Multi-body Dynamics

针对降落伞开伞过程中柔性大变形、强非线性和强耦合性的特点,采用伞载多体动力学方法,以充气时间为自变量,分别建立拉直、充气和稳降3个阶段的动力学模型。对降落伞开伞过程中物伞系统运动学和动力学进行数值分析,研究降落伞开伞过程,通过某型号降落伞飞行试验验证,表明:基于多体动力学的降落伞开伞过程计算简单方便,能够快速指导降落伞的设计迭代,计算结果可以很好地体现降落伞的开伞特性。

Aiming at the working characteristics of large flexible deformation、extreme nonlinearity and extreme coupling in parachute opening procedure,three kinetic models of deployment、inflation and equalization phases were constructed using parachute payload multi-body dynamics method,with independent variable of inflation time.Numerical analysis of kinematics and dynamics of parachute payload system was accomplished during parachute opening procedure,the parachute opening was studied.Verified by the flight test data of a certain parachute,the results showed that this parachute payload multi body dynamics method was simple and convenient.It can guide the design iteration of parachute quickly.The results of calculation well reflected the parachute opening characteristics.