基于数值试验的大型降落伞开伞冲击载荷峰值研究

Research on Peak Value of Large Parachute's Deployment Load Based on Numerical Experiment Method

针对大型降落伞开伞冲击载荷峰值的极限难以通过一般搜索算法求得的情况,采用Monte Carlo仿真和正交试验两种数值试验方法对多因素影响下的大型伞开伞力峰值极值情况进行了研究。当给定21个影响因素在小范围内变动时,近似认为指标极值在影响因素变化边界上取得。对比Monte Carlo仿真结果和正交试验仿真结果表明:两种数值仿真得到的开伞力峰值极值较为相近;Monte Carlo仿真结果随着仿真次数的增加逐渐逼近正交试验结果;可以将正交试验结果作为开伞力峰值的极值。

The peak value of parachute＇s deployment load,which is influenced by 21 factors and is difficult to determine,is discussed based on the Monte Carlo method and the orthogonal experiment approach.The peak value should be got at the influence factors＇ boundary when the 21 influence factors＇ distributed range is small.The Monte Carlo result and the orthogonal experiment result are compared in this paper,the two results are found very close,the Monte Carlo result can gradually approach the orthogonal experiment result with increase of simulation times,and finally the orthogonal experiment results is regarded as the peak value of parachute＇s deployment load.