固体火箭发动机性能可靠性数字仿真

Performance Reliability Digital Simulation for Solid Rocket Motor

采用一维准定常流内弹道计算模型作为性能仿真模型，选定燃烧室压强及推力作为输出参数。在广泛收集某固体发动机有关数据的基础上，对决定发动机性能的基本参数进行了统计分析，根据其实际的数据散布程度和对性能影响的大小选定ρｐ、ｃ＊和α作为随机变量，通过严格的统计检验确定它们的分布特性，然后应用Ｍｏｎｔｅ－Ｃａｒｌｏ数字仿真法，编制出相应的计算程序。在计算机上完成的随机抽样和性能仿真计算分别得到了常温，高温和低温条件下的Ｐｃ－ｔ模拟曲线和性能可靠度。理论计算与地面点火试验结果吻合良好。

one-dimensional quasisteady now computational model of internal ballistics is presented as the performance simulation model of solid rocket motors, and the chamber pressure and thrust are selected as the input parameters. The main parameters deciding motor performances are analyzed statistically based on the extensively gathered information of a motor. According to the real data dispersion and effects on the performance, ρp .C* and α are selected as the random variables, and their distributinns are determined by means of strict statistiCal tests. Then the corresponding computer program is given using the Monte-Carlo disital simulation method. The random sampling and the performance speculation computation provide the pc-t analog curves and the performance reliabilities under the normal, high and low temperature conditinns respectively. The theoritical numerical results are in good agreement with the data obtained in the ground tests.