基于正交试验的大型降落伞开伞冲击载荷影响因素分析

Analysis of Parachute's Deployment Load and Influent Factors Based on Orthogonal Experiment Method

对大型伞开伞过程冲击载荷的影响因素灵敏度进行研究。采用充气时间法对降落伞的充气过程进行建模,并运用正交试验设计方法设计了数值试验来分析初始条件、回收物参数、减速伞参数、主伞参数和环境条件等21个影响因素对主伞和减速伞的2次开伞力峰值、主伞开伞时刻动压等5个指标的影响及灵敏度。通过对比4组不同初始条件的数值试验结果,提出了影响减速伞和主伞开伞冲击载荷的主要因素,并具体分析了各个因素的影响方式。

Influent factors＇ sensitivity in the huge parachute＇s deployment load is discussed in this paper. The dynamic model during parachute inflation is based on the inflation time method, the numerical experimentation is designed by orthogonal experiment approach for analyzing the influence and sensitivity of 21 parameters such as initial conditions, recovery object parameters, pilot parameters, main parachute parameters and environment conditions etc. about 5 indexes such as two parachutes＇ deployment force peak and the dynamic pressure when the main parachute deployed. Four numerical experiment results obtained from four different initial conditions are compared in this paper, the main factors which influence pilot and main parachute＇s deployment load are presented, and the influent mode of every factor is concretely analyzed.